One, Gamzee and Tavros are fictional so you can't go saying that you're married to a character, but you CAN say that you would (like how I say I WOULD marry Dave if I COULD).
Two, you do NOT own Homestuck, so you may not say that Tavros abused Gamzee. You can't force things to be canon because you don't own. There is no such sign that Tavros abuses Gamzee. I can see that you don't like Tavros, but you don't have to go telling the world that they should hate Tavros because something that's not canon happen. I happen to like PBJ, so seeing something like this makes me slightly irritated
I know you were probably scolded about this multiple times, but if you want to go saying things like that, go write an AU Fanfiction about that with you or a fan character.