... No wonder I am a master at the queen's gambit.
... Think before you talk again.
... Dude, my win rate with the queen's gambit is 60%, I am an expert on this opening.
... I studied everything on that opening and know all the lines.
... People say I am "Advanced"
You're a 1200 blitz player. Yet I've seen you, in various threads, talking down to players far more experienced than you.
I don't know what gave you the idea that you're a "master" / "expert" / "advanced" player. Wherever that belief came from, you should work to correct it.
First of all, my blitz rating is "casual" and I am really 1400. My past 10 games (although horrible) have gained me points. That is some proof. Second of all, I am 1650 in chess. Blitz is a different matter. It requires different aspects than chess, especially 3+0 Blitz. You as a blitz player should know that. I talk that I am far more experienced that some of the others because my rapid, or chess rating is higher than theirs. This position is a matter of personal preference, and maybe you prefer black because you played only one game and do not know or understand how blitz is different from other time controls. In blitz, I would prefer the position of black.
rapid isn't "real chess" either then with that logic, only classical is
Probably better for black at our level than GM level.
But like I said, if you can put the LSB on the a square, you will be able to target the a pawn, and the pawns cannot advance.
But I don't think it loses by force for black and in the meantime, the lsb is a bit tied up. Anyhow, maybe I'll be a bit more confident as white after your comment. I get it so very rarely. Nobody seems to want to play the Slav against me for ages except in blitz, where they play daft moves like 4 ... Bg4 or 5. ....Bg4.
Yes, so the position is complicated. But if white can stop the pawns with the LSB they can turn their attention on the queen side. A favorable endgame would be a LSB, pawns, and a king vs a Knight, pawns, and a king, or at least this would be the most favorable endgame choice.
The exact opposite from your preferred defence, which I think you said is the KID. I play the Classical against the KID, where white tries to get a double minor piece ending where one of black's minor pieces is the "bad" bishop on g7, which takes four moves to get into the game on the Q-side. Or maybe just N against black's bad bishop but I like it best when each side has two to three minor pieces because black's pieces always get in each other's way, when black is trying to break out of the bottleneck around c7, whereas white has lots of space to manoeuvre.