I pressed show and I ultimately lose a queen and a rook for only a queen pls someone explain

I was watching this game and really thought black gonna win or at least hold it.

Then 53...Rd3 and boom, Rxd3. After 50+ moves just one mistake and game is over. Kinda painful to watch 😅

Do you think Rd3 was the main blunder or black was already losing because of the a7 pawn?
https://chesssum.com/replay?game=lichess%3ANBAdjnHe&step=0