I used to dislike the Exchange variation ("kills the fun and the usual strategical plans") until I discovered how Alekhine played it (though I prepared something else on the 4.c4 variation). Now, when my opponent plays 3.exd5, I make sure he gets through rough times...
Regarding your game, I see nothing special until your opponent blunders though I'm not comfortable with the c6 b5 plan. Probably because I'm not a Meran player. I think it is a matter of taste, I cannot see a concrete way for White to take any advantage of the backward c-pawn and (maybe) that the b-pawn can also be used to misplace White pieces after ...b4 at some point.
In the position at move 8, I would have probably played ...0-0 followed by ...Nbd7, ...dxc4 with the idea ...Nb6 on Bxc4 to overcontrol the d5 square in front of the isolani and only then ...c6 followed by ...Nbd5.
Then Bg4 pinning the Knight in e2 or f3 may also be used in hope of h3, after which you can relocate your Bishop in f5 which would put pressure on this h3-hook after ...Nd5-f4 and maybe the help of Black Queen along the light-squared diagonal. It's just a general idea.
Against c4, I like playing like this:
One variation that french players universally hate is probably exchange variation. I especially hate the monte carlo variation out of all possible exchange variation, simply because I don’t know an appropriate response to it. I’ve combined some ideas that we see in Queen’s gambit declined meran variation to monte carlo and had a good result. Do you people think that what I did was a possible inaccuracy/mistake? If not, is there a name for the variation that I played?