It was a knight blunder as I saw some ghosts :)
Your 3 point advantage was going away pawn after pawn.
The endgame with 3 pawns more would have been very easy to win for you. So it was correct to exchange stuff, but then you lost track of your pawns by trying to checkmate me. In the next game in the stream you see how I try to defend my pawns at al costs, as against a stronger opponent I am lost with only one pawn less. Anyway, good game!