Don’t pay attention, It’s just bored people in look for attention, It’s really not even worth responding to that messages, don’t waste time in stupid people. As you said It doesn’t even make sense like why are you reading if you don’t like it hahaha.
The only reason people send things like that are because they’re immature and want to tear down someone else to make themselves feel better about their own shortcomings. Personally, I blame the internet- 90% of all the people who write rude fanmail would never have the balls to say it to your face- in person. So, really, I feel sorry for them. They obviously have something weighing so heavily on them that they feel the need to spread hate around.
Ignore them, block them and/or (depending on whether the person is being a true bully or not) report them to Episode.