Troll mods are usually intended to be ironically bad, this thread is about mods that aren't bad for the sake of irony, but are just plain bad.
Basicly, it was supposed to be a remake of Portal, but make it more funnier.
Tip for the developer: If you're going to make a comedy version of Portal, than don't think that putting a bunch of Half-Life 2 NPCs everywhere is going to make Portal funnier.
I'm going to waste time and effort to compile a large trollmap database for the Database of All Troll Mods Ever Created.
Or make an event of all Facepunch members playing the compilation of all thé worst mods during one week.
And see the psychological résults in the end.
Another bad mod I once played was Dear Esther. If you like the mod, I'm completely fine with that, since it's voice acting was okay and it had beautiful atmosphere. Oh, and MINDBLOWING music. But other than that, well....
...lets just say the first time I played it I went to a part of the world that was cut off.