Yeah, that is a hopless postion to try and repair in C.C.
Even in OTB I'd need a very nervous player, it is gone.
Just shows what a shocking move that 11...Nf8? was.
He moved a piece twice in the opening.
Delayed castling by another move.
Dropped a centre pawn.
What a wretched piece.
And then the final ignamity of it all is when he tried to sac it you refused it.
You even left with it when you promote your pawn!
I would have taken that Knight home and thrown it on the fire. 🙂