It's not just "not wanting" something, the original comment wasn't nearly that mild. It's being enraged by it to the extent of making petty, low, personal attacks on someone who steps just barely out of line of their preferred behaviors.

This whole comment chain solidifies my opinion that disgust is one of the driving human emotions. People feel initial, momentary disgust and only then explain it using the most solid justification that comes to mind, but the core disgust is unshakable and precedes all explanations. No one here has managed to procure any argument for why seeing a basic sketch in a certain style is objectively bad or harmful to someone, only that it's "weird" in some vague way. Basically, it goes against the primal instinct of how the person thinks the world "ought to work", therefore it's bad, end of story.

To me it seems obvious. The anime art style is in, especially in Western countries, especially^2 among younger people, and especially^3 among techy people. Ergo, you may see a mascot in that style once in a while in hobbyist projects. Doesn't seem like anything particularly objectionable to me.