I only recently got my first "rude" comment which was "lol the hands" in response to one of my earlier pages--I didn't really get too heated about it or anything because they're not wrong, LOL! CH1 of my comic is extremely wonky and I've p much accepted any and all criticism, rude or otherwise regarding that part of my comic haha!
A style specific quirk that I have is drawing female characters' chest with a pointed edge--I likely picked this up when doing style studies from artists like Butch Hartman and Lauren Faust, both of whom are huge inspirations to me. I've had some people point out that it can be a jarring stylistic choice in some of my characters which is a totally fair criticism and I intend to explore different ways to go about it to see if it works better, however regarding this, the rudest comment I ever got was, "do you even know how boobs work?" LOL!!
I really don't have an issue with criticism, in fact I'm always actively looking for it!! People can be a little rude for the sake of being rude sometimes though it seems.