Here are my deadly sins of anime
1. Too high concept for its own good- basically, there is no rhythm or reason to the story, presentation in a way that's too obvious. Example FLCL, Parasyte
2. One trick pony- there one thing they do over and over again to the point where it's expected. Examples AoT, with the killing of characters for shock value
3. Scope Creep- the story or power levels go out of control and it's clear that the manga author is making shit up as they go along. Exampes, AoT, Naruto, DBZ
4. Centers around little girls. Pretty self explanatory, get that garbage out of here. Examples Madoka. (As much as I enjoyed the art style and deconstructionism, I can't let you live. Go men. *gunshot* )
5. It's a gag series. This one is more of a personal taste, but I just can't value comedy that much. Examples Gintama
6. Too Moe. Too much bullshit with over the top reactions and animations. Example, Samurai X. The OVA was absolutely fantastic, I was so pumped to watch the series proper. Biggest disappointment of my life. FMA also rides this line a bit, but I'll let it slide because it's pretty great overall.
7. Literally goes nowhere. Examples Fairy Tale, Bleach
8. There is a mention of a school club. Exception: Code Geass. CG is baller
9. CRAWWWWLIN IN MY SKINNNN aka angst galore. Examples: Texhnolyze
10. Author doesn't know what the fuck they are doing and are expecting the reader to fill in. Example: Ergo Proxy
Honorable Mentions:
a. Goes on forever with the same Status Quo. Example One Piece