Enemy team was literally 5 man running around making picks, despite me saying, "we need to group, they just keep getting picks" and our top laner was all, "No, we need to farm" as he continues to suicide splitpush while saying, "I'm a Darius, I can't teamfight".
Next game my ADC made some sort of remark that pissed off our jungler, which started a flame war between the two of them. I said, "we get it, you hate each other, just focus on winning and you never have to see each other again," to be met with "maybe I'll start losing :)" from our jungler who would suicide splitpush, dive in 1v5, or ignore barons/dragons and say "unlucky", "that's unlucky", "unlucky they got baron", etc every time he died and ended the game with "maybe you won't flame next time ADC".
Next game we get a toxic duo, that flamed everyone on our team at one point or another throughout the game. Our mid and jungle get caught out near dragon during lane phase, so I run down from red side bot tower to try and get to them to help defend, but they ran up through our jungle instead of coming down to bot lane, so I threw some spells at the people chasing, ulted, snared a few people, and then ran back around the wall since the fight was moving up towards our blue buff instead of being in the river and I wasn't about to run through the enemy team to join. They went on for about 5 minutes about how I was being a "pussy" in the back, full hp, not helping despite me getting the enemy Kat to half health and stalling her for most of the fight before she cleaned up since they wanted to fight the 1v4v3 instead of just running when everyone was snared. After they made the comment, "I remember you missing your skillshots" and "I remember that as well", I said, "of course you do, you're a duo, you'll back up whatever he says even if it's wrong," since they only seemed to help each other (turns out they were a duo as well, though I was just guessing at the time). They then go on berating our ADC for no damage, our top lane for getting flashed on by the enemy team (I think 3 people flashed to get him slightly out of position), while occasionally asking me "why do you think duo = bad" since I was trying to keep the rest of our team together ("just ignore the flaming duo, you're fine"). Half way through our ADC was done with being berated and threw up a surrender vote, but by that time our top had joined the flame war started by these two.
Had another where our Riven was dead set that I was a worthless Morgana support, to the point that I snared the enemy ADC in place for 3 seconds, and this Riven couldn't kill her despite building full lethality, flashed the wall to finish the kill, got stunlocked, died, and then blamed me. Later the enemy Thresh throws a hook at our Riven, so I Spellshield her, she sidesteps so it hits me, Thresh and his ADC engage on me, my ADC and mid team go on them, and Riven's running around next to me (I survive with <100 hp, while she's full) instead of killing the 2v4 that blew everything on the support. Because she didn't engage on him, the enemy team got there in time to kill our mid laner with our ADC barely surviving, and Riven no where around to help them cause she's still following me back to the fountain.
The only consolation prize for all this is I got a "due to your recent report, a player has been punished" instant feedback thing, though honestly I'd rather just not have the stress of these games on my mind.