Maybe meditate and evolve as a human being?
Your issues aren't game related, they are personal. You as a person need to mature beyond this type of stuff. It will generally get better with age, as you become more emotionally stable/mature (assuming you are not like 30)
I got this way about games when I was like 16. Not so much at 25+, and it's laughable to even think about reacting to a game like this at my current age of 34.
Have some 4000+ games of League. The toxicity of the community is greatly exaggerated. Most games, you get what you bring. Anywhere online you will find ragers and trolls, but generally, "ragers and trolls" are just mad about the fact that they are losing, and they cope by blaming others, or getting super defensive when people blame them.