If the lady witch had huge anime milkers hanging out of her shirt and fat thighs with a tiny skirt I'd be inclined to agree but this is such a nonoffensive drawing I genuinely can't see anything wrong with it. I personally know women who make art and depict their women characters way worse than this.
Genuinely the real problem is people having an issue with things that shouldn't be sexual at all. Everybody has breasts, some just have larger ones than others, and to act like that's not real is like some weird titty erasure. Just because you personally find breasts overtly sexual doesn't mean someone else does.
People express themselves in many different ways and for some people they enjoy feeling comfortable in their own body. Having representation not just for different body types but also different portrayals of those body types is important, as long as it's realistic. You wouldn't start a stink over a woman choosing to wear a revealing top or form fitting dress, neither would you mind a man dressing in drag with huge fake breasts.
The problem with oversexualization in general is when it's unrealistic and stereotypical. I promise if you go to any Halloween party with attendees in the 18-30 range you'll see actual women dressed like little witches like that right now.
Comparing someone not finding anything wrong with little boobies on a cartoon hag to people that think black people are inferior is probably the most insane take I've ever seen on this website.
they already have