I'm not going to go through every detail but when he plays d4 and then nc3 you should play c5 and put pressure on his d pawn and then develop the knight to c6. The c pawn would also free your queen, and would have allowed for more dynamic play on your part.
Critique this pls.
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Here is a game I played recently. I didn't annotate it as much as I probably should have, but here it is. I am playing with the black pieces. All the thoughts I put in were obviously post-game. Be as honest as you like. *This is the first time I have used the diagram so some of the annotations may be a little off. Also I did not use the computer analysis prior to this.