Sorry idk how to post games
Is this guy using stockfish?

No. He is definitely NOT using an engine. He hung multiple pieces, and missed taking your hung pieces.
And you aren't supposed to post stuff like this in the main forum...

https://support.chess.com/article/648-what-do-i-need-to-know-about-fair-play-on-chess-com
If you feel an opponent was cheating, report them. Please do not post in the forums.
Discussions of cheating, potential cheating, or cheat detection are not allowed in the general forums.
Watch white towards the end of the game.