What are the worst Anime out there?

I've heard SAO isn't very good. Then again I've also seen a lot of people obsess over that anime. One anime that I watched and hated was "What are you doing here, Teacher!?" It was just really perverted and strange. It was on cruncyroll and my friend made me watch it and it was just really cringe. High School DXD seems cringe too, they had a whole episode just singing about dragon boobs. Unless you're into that then I recommend to avoid it.