Analysis feature not making sense?

Hey!

I'm about a couple months in to learning chess, and I just had one of my easiest wins. (I am black. Opponent is white.) The opponent was just handing me free pieces throughout the whole game. I went to the analysis after since I always go through it after each game. It says my accuracy was 89% which is higher than I usually get, but since I was just taking all his free pieces, I guess it makes sense. However, my opponent got 78% accuracy. No mistakes. No misses. And only 1 blunder. How is that possible? So many of his moves were horrendous. For example, he did 14. Bxh7+....which is just handing me a free bishop. For no reason. But the analysis says "Bxh7+ is good". "An interesting move - although not technically the best." What??? How is that move good? That move was a blunder. He hung his bishop. For move 24, he offered a queen trade while 8 points behind in material and the engine said "this move is excellent." For move 28, he did Rg1, which allowed me to trade my bishop for his rook - obviously a terrible trade, and the engine said "Rg1 is good."

(The 1 blunder the engine says he made was move 8. Bh6 which hung his bishop.)

I've never been more confused. Is the analysis drunk? Or am I hallucinating and totally missing something? How in the world is his accuracy 78% and no mistakes, no misses, and 1 blunder for such a game?

Thanks!

Accuracies and classifications are influenced by rating. That's said, at the strongest analysis level, your opponent had two inaccuracies, one miss, and one blunder