Please help me analyse this game

en.lichess.org/otKpkUJk

Hello everyone,
I was watching the above master game. Stockfish says that @DST001 made 2 blunders.
I don't see how he is better off playing 38 g5 from Ke4 actually played and 46 Nc2 from Ng4 that was actually played.
Why is it better to take the bishop with the rook on move 27?
Also why 42 Nc2 is better than 42 g5 which was actually played.

It is clear to me that 47 Rxa2 is much better than Ra8.

tl;dr Stockfish computer analysis is not helpful for this game.

After the rather passive 27. Rg1, a2 become very weak and falls as within the game. After 27. Rxe4 Nxe4+ Kg1 black has to give the exchange back with Rxg2+ because of the threat against both R and N.

38. g5 probably intends to create weaknesses on the black pawn structure to get counterplay.

Regarding the other cases, it seems to be lost in any case. It's maybe just a matter of which move loses fastest.

You are right. Also move 15. Bf3 is useless. Much better is to place one of the rooks on d1. I was taught that occupying open files with the rooks is very high priority.

I played badly my life is crap LOL it happens everyone loses games everyone in the world who plays chess losses games dont see the point of talking about a game when history will only repeat itself.