Unpopular opinion, I'm sure I'll get a lot of hate for it. For those of you at the beginning saying using someone's art as an example is a personal attack, it's not. Your art is a completely separate entity from you, and it's not heathy to overly attach yourself to your work, and feel like anything negative said about it is someone attacking you personally. Yes, you put a part of yourself into your art, but your art is not you. A better example of what went down in the OP would be if someone came up and called your dress ugly. A lot of people would get offended by that because... somehow the dress is now their flesh, but the dress is not alive and a totally different entity from you. A person calling the dress ugly isn't calling you ugly... just your personal taste, which who cares if they don't like it, you're not wearing the dress for them anyway.
That being said. I wouldn't call it a style since it's more of a lack of experience, but SFS (same-face syndrome) kind of bugs me. Not because I think it's appalling, but with certain comics I have a genuinely hard time telling characters apart. Like, slice of life comics where everyone has similar hair and the same faces, it can get very hard to tell characters apart.
Super chunky lineart also bothers me with certain styles. Such as if the art is more detailed and on the semi-realistic side, but the artist prefers to use chunky lines everywhere, even with good line weight it can still make the art look cluttered? Like the linework is bleeding into everything? It's kind of hard to explain. There are a few artists I've seen pull this off well, but they really knew what they were doing.
Cartoon styles with extremely exaggerated random features that don't quite fit. Like if the artist made the characters bellybuttons huge, or their ears are super large while the rest of the art is more petite. Or if the style overall is just an assortment of strangely exaggerated features that don't fit together, it's good to find a certain harmony when exploring your style so it can look and flow naturally.
Lineart that lacks weight. I've seen a few digital comics with this where the coloring is flat, and it make differentiating foreground from background stuff kind of hard, especially when the colors are muted earth tones. Having some line weight for foreground stuff really helps draw the eye to what you want the reader to see.
Super muddy, same color shading, or burn and dodge shading. While this is mostly me just liking complimentary shading, rl does have a small variety of colors and tones in shadows and light. For example: Skin/flesh in itself has many colors due to blood veins, muscles, fat and such, which all have their own colors. So shadows are never really just browns or fleshy reds, they have a little bit of greens and blues mixed in with the reds and browns. Light can look different on certain parts of the skin depending on how thin or thick it is. Thinner skin may show more red due to the blood vessels underneath.
Shadows and light can also change depending on how they bounce off eachother, as well as how colors bounce.
This:
The face is just... no nose, their skulls. Like... @u@
