1It goes way overboard with being disgusting or disturbing
2It mishandles a very serious subject matter
3It tortures a character for no good reason
4It copies or rips off a better episode and makes it worse
5It has a character does horrible things or acts horribly towards another character and gets no comeuppance for their actions
6It wastes a good idea
7It's too mean spirited
8It tries too hard to be funny
9It has too much filler
10It has a bad ending
11It has characters that always do things the hard way
12It has one character acting too out of character
14It stars a minor character who isn't strong enough to carry an entire episode
15It has needlessly added characters
17It features a celebrity as the main focus
18It features two awful characters and expects the audience to cheer for one of them
19It's too boring
20It has too many plot holes or unanswered questions
21It revolves around a character who's considered bad
23It overshadows the characters
24It kills off one of the main characters and replaces them with someone else
25It has characters that are dumb
26It tries too hard to make you feel bad for characters the audience doesn't care for
27It has too much fanservice