Avoid the tilt tips from avoiding the tilt pros

I'm for sure not one of those pros. The thing that tilts me 0-100 real quick is seeing team mates do certain things that make me think they are brain dead. Examples:

1. Jungler decides to take wolf camp and not defend mid tower. Tower dies.
2. Anyone in any lane decides to stick around with <25% HP. Then dies less than 30 seconds later.
3. Someone constantly walks around not warded areas late game. Always dies but doesn't learn the lesson.
4. A jungler that dives in an early gank, dies, then blames you.
5. The quitters. They make mistakes, do bad, and give up. Grief all day.
6. When you are ganking someone but no one follows up.
7. When that one guy chases, ignoring the entire teams pings, and dies.

These things tilt me so hard. It feels like a little of my trust in humanity dies. Anyway, I know that if I do not belong where I am at I will either drop or climb. I know that my biggest issue is probably tilting and letting it go into other matches. It gets out of hand, but it is really hard to avoid because there are a lot of really slow people that play League of Legends. Like holy shit so many. What are some tips to avoid caring so much about it? I already try doing some push ups/sit ups between matches, and sometimes playing another game for a little while. It does help. I want to know what else works for others.