I've started playing my first D&D game. The group I'm playing with wants me to be the GM, but since I've never played D&D before this I wanted to play as a normal player first.
There was one group member who I hadn't met until we started up a new game and he is the current GM. I don't know him outside of the group--we've never talked or anything before-- but I've seen him at a couple of the Starcraft competitions I go to. At those events, I distinctly remember him being a poor sport, but generally speaking most people just teased him or called him a noob and basically made fun of him for essentially sucking at Starcraft. I've never had extended talks with him since he usually loses in the first round, then makes a huge fuss and leaves. It seemed like he didn't remember me, though. When I was invited to join the group, I asked if we could play a gm-less game so I could get accustomed to playing, and I recall that one of the members in the group said he was "uninterested in noob games", but I didn't know it was the same guy from the Starcraft conventions. We actually stopped playing gm-less games because he was annoyed that the group wasn't starting up a new D&D game.
So we started a new game a week ago. We can meet four times a week (basically Fri. Sat. Sun. and Mon.) but we usually do two per week. But he wanted to meet all four days. The group disagreed and he got upset, so they made him GM to appease him. I can't say whether or not he's "bad", but he's certainly not fun-- he gets upset if I ask questions, which I... sort of have to considering I'm not 100% familiar with the game. He also has a character that has more knowledge than the character should. Like, the character knows if something's been booby trapped when he couldn't possibly know that. If someone points it out, sometimes he corrects it and other times he says "He knows xxyy from prior experiences" which doesn't always make sense. I mean, if we ran across a locked door and tried to open it and it turned out to be booby trapped, would that prevent us from opening other locked doors? Probably not. In any case, he tantrums if someone says he's not being fair, or that he should re-roll, or that his excuse doesn't work for the situation at hand.
Some people in the group are obviously pissed off, but they aren't doing anything. Others aren't doing anything and don't seem pissed off. I'm really, really pissed off at the GM for some sexist remarks he made towards me (that the whole group got pissed off about, but he said he was joking) and I don't want to play with him anymore. I'd prefer playing with the group without him, but he works with a couple of the group's members and they say they don't want to go behind his back, but he would definitely invite himself to games if they told him they were playing a game without him. They say to just tolerate it and that the game will be over soon. From what I've seen at the Starcraft tournaments, though, I can't say I'm particularly enthralled with the idea of tolerating it. I want the group to get together and address his temper tantrums so that we can play normally, but I'm not sure if it's a good idea seeing as I'm the new addition to the group... plus everyone else is just letting it happen. I don't want to ruin whatever camaraderie they have with this guy, but at the same time I don't really want to play with this guy and I'd rather quit if we're all just going to "tolerate" him.
As a new player, should I say/do something? Or should I just tolerate his behavior?
EDIT: Thanks for all your answers! Our group got together yesterday (except for the current GM, who was invited but just... never showed up) to talk. Since a few people were sort of skeptical about not playing with him, we ended up splitting into two groups, but the group I'm in now is willing to continue playing with the others provided they don't bring angry Starcraft guy along with them. And I'll be GM for the first game that my new group is playing!