Fortunately I haven't gotten any real hate on any of my comics here on Tapastic. But I haven't gotten criticism either, which I would like to get to improve.
The only thing close to negative feedback I got, is people commenting words like "update" with lots of question- and exclamation marks, which probably means my readers think I make them wait too long. (Wich is totally true) But it also means they want to see more, which is actually a very good thing.
And once when I did a giveaway I got some hate/ jealous comments from people who didn't win haha. Telling me they didn't want to follow me anymore or something.
So I think I'm very lucky to get so much positive feedback from everyone on Tapastic
Some people in my actual life don't seem to like my comics that much tho 
They think one of my comics is lame and generic, and don't take it serious at all. And they say my other comic is like it's written by a twelve year old, and doesn't make sense.
They also say I draw too many regular teenagers and tell me to create more different kind of characters. (Things like age and bodytypes, etc.). They also think my characters are awkward and unrealistic. That there happens too little in too many pages, that I write boring dialogues. And I don't even remember what they have said haha.
What they said actually bothered me quite a lot, it made me kind of dislike my comics. But at the same time, all the respect and positive feedback I got on Tapastic really motivates me to keep going. After all, the people at school are not even my target audience, so their opinions on my comic don't matter that much. And they have given good criticism and feedback too, which helped me improve. #EmoModusOff