1- Nerfs (the MC get nerfed or the author makes X power nerfed for "plot"convenience,)
2- MC making very retarded decisions.
3- Too many original characters.
4- Too much divergence in the story that goes worse from the original canon.
5- The MC tell people about his powers.
6- The MC tell people he is a reincarnator.
7- The MC tell people he is from another world/universe.
8- More than one reincarnators or similars in the fanfic (this trope almost never work)
9- Buffed enemies (this one is used by more cunning authors, but is basically a indirect nerf to the MC...after all the kill is taking longer)
10- Every female just fall in love for the MC for no reason (poorly written harems fics, every Akikan fic in the nutshell)
11- Mc has the knowledge and power and still lose (This one i personally understand, other factors can decide a fight, a MC can lose but people don't like to read a MC losing)
12- Mc is a bitch/simp/underdog/slave etc, basically don't stand for himself.
13- Gay/lgtb Characters.
14- MC have a trauma.
15- Mc take to long to beat the trauma and because of this everything gone wrong.
16- Mc cries (people hate with passion this one)
17- Harems (No-harem sect hates this ones lol)
18- No Harem (Harem sect hates this ones lol)
19- Mc don't want to be a certain "thing" for a valid purpose and the author make him become the thing he dind't want to be, its forced as fuck.
20- Mc don't want to do a certain "thing" for a valid purpose and the author make him do the thing he dind't want to, its forced as fuck.
21- Mc holds back too much (depends of the context, but i personally think that a MC needs to do above average and you are ok)
22- Mc can't control his emotions (depends of the context, sometimes because of this, things get horribly wrong and just because the mc can't control himself)
23- Author makes/follow too many cliches and the history become predecible (watch a romcom anime and you just watch it almost all of them lol)
Author notes:
I decide to post this list cliches/bad tropes to throw some ligh in the new authors and the bad ones who follows those cliches, probably nobody will read it but i have some fun doing the list lol
For me this list is a must follow "rules", i know these rules are not absolute...they depend on the context and the author writting skills.
If you have more of this bad tropes/cliches, share it in the comments, maybe i will do another "chapter" with them.