"Report x for being toxic"

all I try to do is get my team to act nicely and they accuse ME of being toxic when I am doing nothing wrong.

Alot of problems can be solved by acting improving team morale prior to the game, enthusiastic attitudes and belief in yourself and your teammates.

Before getting in the game, this would be champ select open up rapport with your teammates.

1.) Howdy all, nice day isn't it?

Now at this time you have established friendly discussion.

2.) Let's win! Oh i just noticed we don't have a tank? Here I'll go Malph.

Your positivity will shine through, your teammates will feel better as they realise that you are being friendly and want to do anything to help win the game.

Quite simply, if you have a troll simply mute them, save your mentality for the game. Don't waste time on replying or "defending" yourself.

there is nothing wrong with trying to get someone banned permanently