How do I play like Magnus Carlsen in 1 month??

OK, so I played this game recently, where for some reason my opponent let me win... I really don't understand why he did it (I declined his draw offer in a dead draw position, but then after playing a few moves, I offered him a draw myself (by both the button and offering an instant stalemate, but he declined..????) , but that's not what I'm concerned about. 

We reached an approximately equal endgame, and I really really tried hard to play for a win. However, the time control was 10+10, and I got into time pressure. 

I'm really sure I could've won the game at some point, but I must've blundered. 

Can you guys please take a look at this game? I thought I might be able to pull a "Magnus Carlsen" and win the endgame, but I couldn't quite pull it off... I still have some practice/study to do, I guess.

Also*: I know I missed Qb3 and Bxb7, the first because I didn't expect anything in this variation for white, and the second because I saw something that really scared me, but it was just a phantom. 

(Also, ignore the title of the thread - I just wanted to get people to look at this game, because I'm somewhat frustrated and I think it's really interesting  ) 

Here is how to play like GM Magnus Carlsen in a month... find a genie, make a wish.

Bump! I'd like some opinions from strong players, particularly strong endgame players, please!