It was here

(black to move) when you lost

you had no answer to the threat on your central pawn, I tracked back through your game and I reckon the knights on a6 and h6 were not doing you any good. You may have had some counter with an attack on g3 (pxp) and lived with the Q checking, as you could escape yet still have a threat on his rook. But your pieces are peripheral to the central action.

Yeats had it right with "Things fall apart; the centre cannot hold; Mere anarchy is loosed upon the world,"

your forces are on the outside looking in, where the main action is right up your centre - castle early, centralise knights.