My last few games have been pretty darn toxic. How do you deal with that?

Well, I just made the mistake of playing at night, and as a jungler no less. Long story short, it was a mess, mid laner dies a bunch of times to a combination of their laner and ganks, and infighting breaks out. Lately I've had a good attitude about it, but sometimes it gets to me, especially when they do things like steal my blue buff (when they're manaless AND we have a good mage nearby), type paragraphs as to why its my fault, and ignore every single comment and suggestion I make while still throwing taunts out. The lengths players go to attack their teammates is amazing to me, as is the how quickly they'll turn. This night I literally had a mid laner type "I'm done," after their 2nd death 6 minutes into the game.

So, I'm left to wonder, how do you deal with this? You personally, I'm sure I'm not the only one to think about this. Is their some reasource I haven't head about before now? I have no intentions of quitting league, so I'd like to improve my experience so far. Heck, maybe one of you know a way I can help.