I am a cheater monkey

I posted this for two reasons:

Firstly I wonder how black can refute 8.Bb4 or can he refute it at all? When I played it I thought it was to soon, but it's anoying enough in blitz. The comp evaluates it as a mistake ( before the move the engine prefers white, then black), however, it's on a really low depth so I don't trust it. I also don't understand why would 8.Bb4 be that bad? It seems as white gets some nice pressure on the dark squares since a quick elimination of the bishop for an example 8.Bb4 Bd6 doesn't quite work, because of the Queen eyeing the b7 square also the pawns or the knight would need two moves to provoke it, which would only lead to a loss of tempo and bad pieces. But then again, I am just a patzer.

 Secondly I find it funny how the opponent called me a cheater monkey when he blunders a whole rook and then a queen like a professional noob. Kudos to him!