I had this one incident when playing Heroes of Newerth that seems particularly fitting...Havn't played that game in a while though.
I joined one of the random games there, and tried to talk to my four partners about which characters we would be choosing. They proceeded to completly ignore me so I just chose my favorite (and best) character: that little squirrel guy in the mech who's name I can't remember. They all chose carries.
For those who don't know, all carries is pretty much the worst possible team combination I can think of. Just terrible. I made sure to tell them so and they just told me to shut up.
Anyways the game started, I got my starting items, and I went to the right rune spawn thing, as per standard procedure. None of my allies did the same and I ended up getting killed in a 3vs1 fight where my supposed partners didn't do anything to help.
At that point everyone on my team starting calling me a noob and saying that I was going to make their team lose (despite having only died once) one guy even said that he would try to kick me if I died again.
I just flat out said that they were all terrible players, and that my death was their fault. Everyone knows to grab the little rune powerups at the start and I told them all that beforehand and that they should have gone to them with me, the reason I died was their own stupidity. I then told them that if I had made a mistake there I would be fine with owning up to it, but I didn't make a mistake, they did. I said they were all terrible players who chose a terrible hero combination and then just said that they were all going to get a terrible score. I pretty much said that if they wanted to criticise me they needed some actual skill to back it up and that they did not have the right to insult my playing when their own was so bad.
Then I predicted that me with my damage nuke squishy class would carry the game for our entire team at the end, and that I would do better than all of them, probably even all of them combined.
The whole tirade shut them up pretty quickly.
In the end I had like 32 of the 48 or so kills on my team and we won.
Those guys were so infuriating.
This post has gotten way bigger than I thought it would be. :/