A Bug

So the bug is that the part of the game review that says your supposed rating based of the game says "It was a well fought middlegame that white got the better of" Yet Black won the game and had higher accuracy. 

here is the game

You might want to post this in Chess.com Beta.

Also, Black might have had a better endgame

According to it there was no endgame

I guess because the queens are still on the board?

no. Although white generally had a better endgame than black, it was a sudden win because white blundered on move 29.

A checkmate is always considered part of the 'endgame'. That means White was winning but blundered mate

It just doesn't grade it since the endgame is, therefore, not long enough.

thx for all you input!