Good comedy anime is one of my favorite things in the world but there certainly is a massive amount of abysmal shit out there. The batting average must be like a tenth of what you get in English comedy.

There just seem to be a lot of really bad ideas of what's funny in Japanese culture. You find almost all of them in harem series and in eroge. Shonen comedies have some really obnoxious tendencies as well.

I actually get the most consistent enjoyment out of shojo series, which I guess makes sense since it's the polar opposite of those