Caro Kann (Fantasy Variation) help

This is a game in which Ivanchuck played Baadur Jobava in 2010. Its the only gm game I could find with this variation. But this game is insanely diffucult to study and it is unlikely I will ever see anything like this.

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Also, looking at a database, it seems that black has extremely good winning percentages with qb6. I'm wondering what the flawed points of this move are

u can chose not to play the fantasy variation.

There aren't any. There have been many GM games with the move. I believe it's one of the lines that causes White the most problems. That said, I don't think White is worse, but Black's position is much easier to handle in many variations.

if you're playing at club level and want to avoid heavy theory when playing white side, u can play 1 Nf3, ull have chance for many transpositions and lines, u can play felxibly also seeing what ur opponent plays, and i think in that case there would be better tendency for the better play to win.

On the minus side, 1 Nf3 tends to be slower than 1 e4, so if you're not in mood for some postional manouvering, can work against you.

Bit extreme to give up his choice of first move for the sake of an obscure Caro-Kann line. There's plenty of move order headaches with 1.Nf3 to be considered.

I currently don't have a repertuare and I don't really plan on making one. Out of the blue I decided to try the fantasy (with no knowledge of it besides for the move 3.f3) The game I played involved sacking my c pawn for a positional advantage, and overall the game felt extremely natural.

After the game I decided to look into the opening a bit and I came across the Qb6 move for black. The reason I was so concerned about it as white is because this move removes the "natural" component that resonated so strongly with me from the game I had previously played.

My curiosity for the move is not in order to change my opening repertuare. Its just to get a better feel for the position.

It must be the feeling that the game is no longer natural that makes it harder to play as White and gives Black better chances

You keep mentioning Qb3, I assume you mean ...Qb6? The line that some strong GMs have played as white is 

1. e4 c6 2. d4 d5 3. f3 Qb6 4. c3 e5 (no other move makes sense) and then the counterintuitive 5.Qe2, the idea being to meet 5...exd4 with 6.exd5+, which forces the K to move. Maybe there's some mileage in this, but it needs a lot more research. 

oh, my bad. yes I meant qb6 and I changed it in my posts. I can see play continuing as something like this: although there seem to be tons of possibilities with all the pawns in the center.