That's the truth obviously. And it shouldn't be conceptually difficult to understand that how hard somthing is determines the amount of skill to be successful at overcoming. The more people try to win 4v4, the harder it will be to win over those players and the more skilled you have to be to be successful.
But some will just continue to stick their heads in the sand and repeat "no skills at 4v4 and what I do is elite!"
All it would take for someone to prove that false is to go play some 4v4 games and if not every game turned out stomps you would be proven utterly wrong. And you are, of course. The other day I played a game that we won with 5 tickers left.
Didn't someone post a couple of months ago, the usual rank of teammates between an Axis and Allied random team ?
For any gamemode (and even other games) with teammates: if you are not willing to carry your team, communicate or give some kind of orders, don't expect to go too further on the ladder.