Dan dan daaaaaaaan! It's Dan.
Art talk:
The art here is rough, but it does improve as it goes along, and the visual storytelling is clear enough to follow the action. Generally it feels like you're just starting out, but it's not a bad base to improve from.
I'd advise as the biggest area for the most dramatic improvement to spending some time on figure studies and trying to give your characters more of a sense of volume, like they're three-dimensional. Anatomy is one of the most important things to study if you make a comic with a lot of action, and it really helps add power and dynamism to poses. It also helps give a sense of space, height and power, which are some of the keys to drawing really good action.
Spend some time looking at tutorials and reference on clothing too. It feels like you're just putting creases wherever on clothes right now, but you'd get a more polished look if you really thought about the direction, thickness and placement of your clothing folds. Different fabrics and cuts crease differently, and clothes creasing or flapping around can add loads of energy to a scene, it's really worth studying.
I'd also advise considering looking into how you use light and dark. Perhaps invest in a brush and ink so you can block in some shadows rather than needing to rely only on hatching. It would mean you could get some more dramatic depth and space, and have characters with strong black and white areas on them to make them stand out. Getting a set of pens of various thicknesses would help too so that you could use some finer hatching alongside the chunky lines. It would make things read more clearly.
Story talk:
Stories about villains are really hard to do well. I know the blurb asks the question "is Dan a hero or a villain?", but as far as I can see, it's not even really a question; he's definitely a villain. Sure, he has a motive for his quest to go around killing people, that being that they were mean to him for living in a forest and for being of low academic ability (that said, he really can't be that bad, I mean, he got into college to study maths), but his reaction is to basically massacre his fellow students. That's what a villain would do.
If you have power, going around killing people indiscriminately is easy. The thing that marks a "hero" is that they don't just take the easy path of killing every obstacle in their path. Heroes do things that are hard for the sake of others. They put the greater good above their own personal desires in a way that often makes them feel conflicted.
Dan may say he's trying to destroy corrupt society, but what he's actually doing so far in the story on the page is revenge-killing people who were mean to him at school, and killing the law enforcement coming to stop him for doing that. He's the protagonist, but he's not a hero, because he's completely selfish; bad people called him a "turd face" so he's going to kill them. The police come after him so he kills them.
Like compare him to Naruto, a character who was ostracised for his background and bullied relentlessly through school and childhood, but who strives to show everyone he's worthwhile by becoming the best ninja and protecting his village. Naruto is a hero. If Naruto sees even the slightest chance of a person being redeemed, he'd not only refuse to kill them, but risk his own life to save them. Naruto will risk his own life to protect others. Naruto would never kill somebody just for bullying him because he's a bigger, stronger person than that. Dan is really more like the villain of My Hero Academia, Tomura Shigaraki; he's had a traumatic life and it's lead to him wanting to destroy society through violent means rather than working to improve it, and to seek vengeance on those who wronged him rather than weathering the pain and forgiving them or trying to redeem them. He's a villain because instead of protecting and nurturing, he only destroys; he wants to destroy everything and he wants to destroy himself.
Honestly, I was cheering on the people who were trying to stop Dan. They seem like fun characters, they have all these nice character dynamics going on where they're kind of like a dysfunctional group of colleagues and they seem to really like and care each other, so I felt way more empathy towards them. They know that they're up against a scary, almost unstoppable murderer and they're risking their lives to contain that threat and putting on a brave face! I immediately felt like "aha! These are the heroes!"
This is why I'm confused about the question in the blurb asking "is Dan a hero or a villain?" because to me it seems that's not the compelling thing here; I think it'd be stronger to market this as a story written from the villain's point of view about how society has created this monster; an unstoppable murderer, and the people who are sent to stop him, while they are antagonists, are actually heroic.
A bit like Death Note, where while early on it's debateable whether Light is an anti-hero taking out criminals, he quickly slides into full-on villainy when he resorts to killing those who oppose him, so we have a villain protagonist and we're compelled to see what awful, but clever things he will to to escape capture. To me, the strongest part of Death Note was the first half, the L arc. L is the closest you get to a "hero" in Death Note because while he does do some questionable things, he's generally on the side of justice, he's a heroic antagonist. That whole arc is incredibly compelling, because part of you wants to see how Light can escape and whether he can achieve his goals, but part of you wants L to win because Light is a monster.
So to summarise, rather than just presenting a bunch of shockingly violent revenge acts and saying "is the person getting revenge the hero or the villain"? It might be stronger to assume that yes, actually, this guy IS an awful person. Society has created a monster. Now society, personified by these well-meaning but often flawed "heroes" must try to stop him. Can anything stop him? Well, that all depends on the message you ultimately want to get across, and how optimistic or pessimistic you want to be. Perhaps the message will be that only more violence can stop it, as a "hero" stops Dan in a bloody fight by being just as ruthless and violent, and as the crowd all cheer the wild eyed killer, bathed in Dan's blood, the framing will make us question... has this created another monster? Are the police actually just more thugs but government appointed ones?
OR maybe a more positive message, perhaps Dan is rehabilitated or redeemed and fights a greater threat, exploring the idea that maybe murderers are necessary for society to function in times of war, or perhaps the heroes win in the end and justice prevails and the message is that there are just ways to be violent, or that when society creates a monster, it's a tragic waste.
Basically, just asking people to decide what your story is about and telling them that "In this society searching for answers only results in more questions." isn't going to cut it if you're trying to make such a morally complex story with a villain protagonist who is a murderer. You will need to make a decision about what your stance is and what your message is and how this will ultimately end; what is the point of your narrative? What are you trying to say? That's the question every creator ought to ask themselves.