If you're doing this, you're probably the troll, not the others
and long story short, you shouldn't be asking to be reporting someone when you yourself deserve to be reported for harassing them.
If someone picks a champion for a role you disagree with, don't talk trash to them. Don't instigate anything. You're opening the flood gates for no good reason.
Better yet, if someone does something you disagree with. Don't say anything. At all. No why's, no buts no multiple periods no sighs no whatever. Because if you put yourself in their shoes, and them in yours, you probably wouldn't enjoy the same type of attitude that you have yourself.
Calling them pathetic or hoping they get banned isn't a helpful cause to your threats to report them. It actually (apparently) flags you instead. So don't do it. It makes you look like fool, and it makes the other person angrier for the next game. Why should they have to tolerate what you wouldn't?
mid lane in which your team mate was playing
and at level 6 would have easily dominated due to taking
plus
and
every single game and then getting angry every time a team fight is lost its lost because you took (Pull Comp) you contribute nothing to fights late game and what do you think the enemy will do if they choose a (All In COMP) and took (CC) then you are going to lose because first thing the enemy will do (Hard Engage CC) Rush back lines GG.