In my whole League career, I had 3 (THREE) trolls on my team

Or maybe the community really is filled with people that:

• ban your pick intent because you won't lane swap with them
• intentionally deny you resources
• follow you around instead of going to their lane/jg and spam taunt
• consistently leave you to die
• walk away any time you go near them
• tell the enemy team where you are in all chat
• buy all one item (tears, zeals, boots, etc)
• refuses to cs, help lanes, just AFKs at turret unless an enemy champ walks by

Not saying this shit happens every game. It's pretty RNG how often it happens, but at least one of those things happens once a week.