How do you know thats what he chose? He calls himself a beginner so I'd assume he chose beginner. And even if he didnt it doesn't matter. He is posting now after reaching the level you say he should probably be at. And I'm telling you he can play 100 more games and it won't be any more competitive for him.
His very first game was a loss dropping him about half-way from 1200 to 800. That is exactly what happens when you lose your first game after being initialized to 1200.
So he chose 1200.
idk what coolout means by "one of those accs" tbh but he did mention alt acc so that was my guess