Something that used to bore me is the new custom in almost all romcom anime where they add the Harem element and where the character simply never ends up with any of the protagonist, it's getting boring those Harem stories where you know that all of them are just to fill the story and have Ecchi moments without relevance, before in the stories that had some romance the protagonist did end up choosing someone but now they are just completely absurd.

Another aspect that I have started to notice repetitive is in the fantasy and magic anime where the protagonist is always rejected by the “hero” group and now he lives much better being alone, it is getting boring all anime of this style where the protagonist is always marginalized by the “heroes” but is much stronger than all together.