Was he cheating?

Was he cheating in lichess.org/SYgUuirA

His every moves were very much accurate and he had 0 mistakes and 2 blunders. Normally, a 1600 will sacrifice his rook by capturing the pawn to promote his pawns asap but he didnt. He did a clever move. So I think he was cheating. Thanks

PS its for just a discussion whether he was cheating or not. No public shaming, no spaming.

All his rankings on various games are in line with each other. There's no pattern of them trending up.

He's not winning more games than he's losing.

When you look at the profile page of a cheater you might see something like this:

He wasn't cheating, he blundered his bishop. You just counter-blundered; 10. Bb7 would have saved your queenside.