A youtuber I really enjoy watching, the Mighty Jingles, a world of tanks youtuber, (Even though I don't play world of tanks much any more) once said something along the lines of this:
"Eventually after playing enough games the times your ass got carried, your joe average teams, and the times your teams were a bunch of idiots who couldn't find their own ass in the dark if not provided a flashlight and a map will be balanced out, leaving only your performance as the variable,"
It holds true in world of tanks and it holds true here. Yes, initially your rank may be due to inexperience and trolls, but eventually you play enough games that, just like WOT with win-rates, the only influence becomes your performance.