Okay, I read all of what you have at the moment and here's my two cents. A quick and free writing critique that I hope isn't taken as me being mean, cause that's NOT my intention, I'm not hatin, just trying to help, I guess.
I think it's good that you noticed something you could work on and are looking to perhaps fix it. That's how you improve. Some commenters can be very rude and wrong, but others (while they might not word it as gracefully or helpfully as they should) might be right about things you need to improve on, so don't exactly ignore all criticism you see even if it sucks to get...
Your art is definitely good, what these critics might be sensing even if they can't articulate it correctly is that the dialogue is rather stiff and the characterization could use some tweaking. I'll elaborate though, since there's no point in saying this if i'm not gonna give a way to improve it.
Characterization is a more mild complaint because the story has barely gotten started in terms of plot, so we don't know the characters THAT well yet. Though I can say that they're a tad bland, though lovely to look at. Also, everyone is WAY too eager to share their life story. Did Jace really need to say "my family isn't a part of my life anymore?" It could've been just as effective with stopping after, "There's no rush at all to get back", leaving the reader to wonder why that might be.
It's a classic pitfall to feel that the only way to get out a backstory is to have the characters talk about it then move on and now you don't have to worry about that anymore. But most people aren't so eager to just tell a stranger their motivations and life situations, unless them being an open book who will anyone everything about themselves is part of their personality, which is fine.
I remember one quote i heard on youtube that "backstory is the story". Treat character's backstories more preciously. Not that you have to hide everything about your character, but avoid info dumping because you think the reader has to know it all at the beginning. Slowly reveal things, so that reveals have more of a punch and so we get to know the characters for their personality before the weight of their full backstory. And it doesn't always have to be revealed in conversation, if plotted out correctly flashbacks CAN be very effective. Conversation reveals of backstory are definitely something that needs to be earned. That's essentially someone sitting down and telling someone else their whole life story. Tread lightly and treat that as heavy as it would be in real life. If treated that way it can be a great way to show how close two characters are or have become.
Now moving onto the dialogue which is connected to characterization as well. But, I feel like this is the major thing people mean when they might say the writing is "bad". The dialogue is very flat and lacks a natural flow to it. Now, truly good dialogue is HARD to write, so don't feel bad. But there are ways to get better.
1) Make the dialogue personality driven. Make sure every character has a distinct way of talking. imagine if you could cover the pictures and only the dialogue remained, would you still be able to tell who was talking if that was covered? So, rather than just trying to get whatever information you need to out of a character think about how they're saying it. Is there a more personality-driven way that they can say what they're saying? Figure out how their personality works into what type of speaker they are and how their sentences are constructed.Obviously, this does mean that you have to know your character's personality pretty well.
I did notice that once Charlene came in the dialogue did get a lot more fun. Her conversations with Evie are definitely better. So perhaps tap into some of that and run with it.
2) Use dialogue to reveal changes in character and development.
Also keep in mind how people speak to other people and can reveal how they feel about said character and how their relationship is developing. A person might be very spare with their words at first, but then slowly open up. A person might have two different ways of communicating. One type for when they're with new people, and another type with they're with people they're comfortable around. Seeing a person shift between these two types with a character they slowly get to know can be rewarding to read. So...yeah, also think about how dialogue evolves and shows character relationships.
3) Really think about how an actual person would say it versus what's grammatically correct. Most people will say "Me and Kevin" rather than "Kevin and I". If someone says "Kevin and I" you're giving the reader an indication that they're very proper and grammar conscious and then will expect all of their grammar to be correct.
Also, sometimes people start incomplete sentences. Like "You going home?" sounds more natural than "Are you going home?" Or saying "Cause" rather than "Because".This is why most dialogue sounds stiff, that forcing people to talk in complete, grammatically correct sentences.
Don't forget words like "well", "just", "I guess", "yeah", "kay", "um" and other little connector words and phrases. Having a character say, "I don't know, I feel bad today." sounds a bit stiff. Having them say, "I don't know, I guess I just feel bad today." sounds much better.
4) And here's a weird point...go sit in public places and just listen to people talking. Haha. That'll give you a good sense of how a variety of different people that you might not be around otherwise speak. It also helps to just, speak your dialogue out loud before you write it. That way it can run through that "in an human voice" filter before you write it.
5) Natural flow. This is hard to talk about and something that will come over time. It's basically plan out the conversation to sound like it's not planned out. You have certain intentions, certain things that you want revealed in each conversation, but the dialogue needs to flow naturally between that information. Chapter 2 especially has a bit of a flow problem. But, like I said, this topic is a lot harder to talk about and master so I'm not gonna bog you down with too much info, but always make sure that there is a connection between every question being asked, every answer given, and every transition to a new topic. Don't stop and start unless you intentionally want to put in a pause for awkwardness or drama.
Anyways, I really hope this doesn't come off as mean. I'm not trying to be mean, but I think the true way to start loving your work again is improving on the things you realize might be holding you back. Your art is good and you do have a lot of subs, but it's always good to keep improving.
Also, feel free to ignore me and my long paragraphs if you so choose. I'm definitely not the be all end all to advice on anything...