Most of those aren't unfunny because they're unfunny, they're unfunny because they're overused. Also, plenty aren't even supposed to be funny; you're basically just hating on tropes in general for being overused, not comedy.

That said, I agree with you to some extent; I personally don't find a lot of anime comedy that funny. The stuff I do has me rolling, though...but it's few and far between...

I respect the anime that do away with the tropes though, now I think about it Konosuba was fucking hilarious precisely because it did for the most part buck the trends...

Haha, exactly. The anime I tend to find most hilarious is the anime that pokes fun at those very same overused tropes. There's things like KonoSuba and Overly Cautious Hero that are mainly funny if you've already seen a fair bit of others in the genre.

A character sneezing when they get talked about, they always use this cringe cutaway

This one is often alright, in my opinion. Kind of funny/silly exactly because it's so overplayed. Kind of self referential in my opinion. Also takes basically a second or two, so no real loss either way.

The stumble in on a girl scene because she left the door unlocked, I actually respect the anime that mock this by having the man knock first

Man, and I know this goes against what I said earlier a bit, but this one pisses me off because it's so overused and almost always out of place. I agree that the subversion can be funny, though. I've seen a few where, "for equality" for seeing the women undressed, the stumbling dude starts stripping. Obviously does not go well. There's also a version where he says 'I know I'll get beat for this so might as well keep looking.' Couldn't find that, but found this clip from the same anime.

Hot springs/Baths, yes we know you love them Japan...

Again, not even necessarily funny, just often used.