I remember my character from my first campaign ever...cannot remember his name, but he was a half-elf cleric. My DM for that game spent the entire time trying to kill us, at one point breaking all of my clerics limbs on account of constant critical hits by formians (Since I had way too high of an AC by level 5, I got critically hit almost every attack). My brother had a ranger and sliced through them, and a few restoration potions later, I was back on my feet, but this isn't the worst part.
The next session or the one after (cannot remember), we had to fight a blue dragon...with a cone of lightning. At this point, the DM's remaining in party character (which made me think that no DM should ever have characters in the game because they seemed to be untouchable) ran into the trees, leaving me cleric and my brother's ranger (which was not allowed to have an animal companion without what would amount to a pain in the ass sidequest) to combat the kill beast. Needless to say, it kept attacking me, mostly because I was the only one not in the damned trees. I just kept healing myself while it breathed way too often and hit it with searing light while my brother turned it into a pincushion and the DM's halfling rogue/assassin threw or shot something at it every now and then.
After we killed it (because the sessions were done my phone, I had infinite spells to make up for the DM's campaign to kill us all as fast as possible, except for his characters), my brother's ranger understandably wanted to take its hide and claws and such, but the DM pretty much forced him to give some of it, and most of its teeth, which with the claws were somehow used to make weapons, to the halfling character, or the characters would fight to the death for it. Normally, though his ranger was chaotic good, if would be a fast fight to the death, as I was on his side and would crush the rogue/assassin, but I am thinking that the DM would have killed us off at that point by having the halfling get a near constant stream of criticals...if the DM was not my brother's friend as well, my cleric would have lit the halfling on fire with some alchemist's fire and start blasting her with searing light until she were only a charred corpse, then I would have had him leap off of a high cliff, tell the DM to fuck off, and then leave the game. Of course, I only felt this way after I spent most of a session with at least two broken limbs at once and got critically hit two or three times in a row.
Near the end of our playing that campaign (it died out after we were surrounded by stone giants and I was left behind to my death so the DM's nigh invincible dwarf barbarian / gladiator could charge them), I started to do shit to intentionally piss off the DM, like grabbing the Leadership feat and constantly bug him about my followers and cohorts, eventually starting a church and leaving my cohort in charge.