Its been alright, could be better, could be worse.
Really depends on what you value, ultimately speaking.
>comedy
there's been good ones and good elements in other shows
>ecchi
No problems here imo, at least thus far that I've noticed.
>mecha
absolutely terrible decade for mecha, only things people seemed to like were gundam.
>action/adventure shounen
depends on what you think of them, personally I think they're "just okay" compared to the shounen of the past.
>isekai
its been a very good decade if you like this subgenre.
>slice of life
mixed, some good shows here and there but it really depends on what type you like.
>romance
I don't know as much about this genre, but there's been a lot of trashy romances if that's your thing, and some good romantic comedies here and there that people really like, so probably better than the past ones?
>horror
No idea about this one.
>seinen
Kinda broad
>sports/competition/cooking
There's been some good ones I suppose, but again it depends on your tastes.
>westaboo/cyberpunk shit
Not as much notable shit this decade, and imo that's for the best but that's just because I personally don't like it much.
>edgy stuff
I don't feel like there's been too much, but there's been some, probably worse done than past stuff though. Haven't been paying as much attention to this though.
>mystery
I don't really remember any noteworthy mystery anime.
>psychological/thriller
Some okay ones here and there but not too much afaik.
>weird shit
No idea as I don't pay much attention to it, I don't remember much but who knows.
>sci-fi/space shit
usually connected with mecha, there isn't much of anything afaik from last decade.
>wholesome shit
See slice of life, though I feel like people are enjoying the wholesome shows so yeah
>fantasy
See: isekai. If you want non-isekai fantasy, that's rarer.