Moetan (something?Maybe?). I watched a bunch of it in high school and sparse some stupid fun english lessons at the end of the episodes ("Why don't you come over to my house and fuck my sister" was one of them) It was just some loli bs. It started out as a parody, which I always enjoy, but just went into nothing but fanservice ecchi bs fairly fast.
Love Stage. I had read like a chapter or two of the mango, and it was somewhat promising BL-parody (kinda like Gravitation mango) but did the same as moetan, except that instead of just fanservice it started taking itself seriously and threw away the parody. It was possibly the most cringey crap I've watched.
Love Hina. I bought a few DVD's of it when I was in elementary school or something and it traumatized me.
Honorable mention to some queer-baiting OVA about policemen or detectives. One of them was red-headed, it had horrible OP & EP and it was so boring both me & my friend fell asleep during it.(can't for the life of me remember what it was called)
Also some final fantasy rip off thing I bought along with Love Hina and the only thing I remember about that is some cowboy yelling "MY WEAPON IS MUD"