I have a temper when it comes to games. It's gotten better as I've gotten older, but I still end up getting upset whenever I get stuck at a hard part in a game for too long. "Cheating game!" and whatnot. However, there are two points where I remember being so utterly upset that I needed to stop playing.
Street Fighter 4. I suck at fighting games. No way around it. Suck. Suck. Suck. However, I still like playing them for the storymodes sometimes. Dead or Alive and whatnot. So, when SF4 came out, I picked it up. And when I got to Seth, the rage. The sheer rage. I threw my controller. I stomped on my floor. It go so bad that I pulled the game out, shoved it back in its case, and tossed it under my dresser where it would be too much effort to reach whenever the little voice starting saying, "Come on, one more try. You'll get him." I traded the game in after two weeks of owning it. I talked to my friends about it later, both who managed to get 100% on it, and they said that Seth was pretty cheap, so I felt slightly less bad.
The other time was playing that PlayStation Store exclusive game where the world has been overrun by a giant dust storm. From Dust or something like that? I can't remember what it was called, but you're a survivor trying to make his way back to his family. I was having fun with it, climbing all over the place, using survival skills, being smart with enemy encounters. And then I got to the part where you had to fight three people at once. You have one bullet. The game tells you, "Sometimes, if you kill the strongest enemy in the group, the others will surrender without a fight." So, I shot the leader--or at least who I thought the leader was. He went down, the other two rushed me, and I died. Okay. Replayed that part, shot another guy. Same thing. Reload a third time. Shot the third guy. Same. Damn. THING! I replayed that part seven times, each time shooting a different one of the guys, and I kept dying. I tried to look it up, watch a video, anything. Everyone just said "Shoot the leader." I was mighty pissed, so I ended up uninstalling the game and swearing to never touch it again.
EDIT: Oh yeah. I never EVER want to replay the opening level in Dead Space 3. After playing Hardcore mode on that game and dying one or two levels in and then having to sit through the damn cutscene and do the whole tutorial over and over again, I started to get pretty angry.