Both players made errors, but hey, that is the game is really - at least at the "mere mortal" most of us play at.
He who makes the least or the smaller errors wins.
White loses a piece.
7.....Nf6 holds on to it. The text move doesn't.
This is a huge long shot, but it is impossible to draw or win a game after you resign. Always remember that!
What White needs to see in this position is that he is a piece and a pawn up and your opponent’s king is basically alone. Black is completely weak on the white squares around his king. Throw a rook to g6, then bring the other rook to g1, bring your Queen to g2, bring the knight to f5, and push the h-pawn. Basically any order of these moves and Black is toast. And White starts to do that.
35. Ne3? Qxa2+
Move 41. Qa5 took White’s Queen out of the game and she is the only one who can handle the Black Queen in the open space. The plan has to be to get the White King back to his lady friend for protection.