On the surface level, bad art for comics.
And intro lore dumps - if it can't be short and it's filled with unknown terms, perhaps the author should consider another way to feed the information in a longer exposure braided into the plot. Seriously, it's not THAT tough to just explain things gradually, and it's way better when it can correspond to a scene it's presented along with.
Whatever you might think of it, I skip stuff written/drawn by bigots. I give no two shits about what they have to say, and I'm not gonna up their view count or give them opportunity to make more money. They can funnel whatever they make elsewhere, when I can pick something relatively good written by a bigot or by a not-bigot, guess what I'll pick? I don't have all the time in the world to do both in the long run, I'd obviously rather give a listen to someone who's not a piece of crap. And it's not about "seeing their point of view", I can research that elsewhere. Don't need to read "Mein Kampf" to know what Hitler thought of Jews.
Love triangles. Ugh. UGH.
Stuff with rape. Feels like it's been saturating media more and more these days, and it's often so fetishised it makes me want to puke. Waving at you, Martin.
Caricatures of minorities, be it queer people or disabled people or PoC.
I'm also really wary of stuff involving mental illness. It's often so badly written, misinformed and misrepresented for shock value that sometimes I want to throw my laptop under a bus. Schizophrenia, bipolar disorder, and borderline personality disorder are the major ones here (and also what people call with the incorrect and outdated term "split personality").
I have checks on several things from the last 3 paragraphs and just... the fact that when such a creation later gets mainstream popular and reinforces the stereotypes and fuels prejudice... man, people piss me off.