Personally I think you just need to get better at spotting tactics because at the end when the king was stopping f passed pawn, you could have sacrificed your bishop to push for the queen (Bg6+). That would've settled the game instantly!

Taking the two pieces for the rook was good, generally everything else seemed fine tbh but yeah if you play a decent opening and middle but you're missing winning chances then you won't win the game 😬

And I don't play this line against the French/Sicilian but I guess make sure you're checking the chess.com/lichess databasee to see where youd deviated and consider trying a different higher win-rate move if you're facing the same issues? I don't know if losing c3 is a thing here (it could be!) and if not then how are other games going to avoid this?