Well according to stockfish, in game 2 the two biggest blunders were 23. black pushing c5 pawn and 38. black knight to g6 (both of which FC was able to capitalize on)

Interestingly black was winning for the first 22 moves or so but it was by a pretty small amount. After that white was winning for the rest of the game.

FC's knight was trapped the whole game on g1 and the biggest blunder I found was 7. King f2 (which would have dropped the d4 pawn if black bishop g7 or close to it, and could have caused a pinned queen.). It was a pretty clean game honestly, blunders-wise.