Your thoughts on hate/criticism?

I know that constructive criticism is a good thing, but what about when it comes to fanfictions? Like, it’s not supposed to be an actual master piece, it’s just a random story written (most likely) by a teenage fan girl. It’s not that deep. Especially when it’s not even a criticism anymore and it’s straight up hate. How sad your life has to be so you send death threaths to kids online, because you don’t like story they made? Nobody’s forcing you to read it if you hate it sm. Anyway, what are your thoughts?