Unintentional Mates

This was a complete surprise
why do people not want to trade queens? Like in a lot of my games people avoid queen trades even when avoiding it loses a full piece. Queen isn't that powerful alone bro

https://www.chess.com/analysis/game/live/132734400741?tab=review
Never seen a mate like it.
However: Was the mate unintentional?

https://www.chess.com/analysis/game/live/132734400741?tab=review
Never seen a mate like it.
However: Was the mate unintentional?
Desperate would describe it more accurately from MY side of the board.
I certainly did not play for it.
[Event "Online Game"]
[Site "Chess.com iPhone"]
[Date "2025.01.17"]
[Round "?"]
[White "sheikh_mahdin"]
[Black "LesterCat1023"]
[Result "0-1"]
[FEN "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"]
[WhiteElo "209"]
[BlackElo "227"]
[Termination "LesterCat1023 won by checkmate"]
1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 Qe7 5.Nc3 h6 6.h4 hxg5 7.Nd5 Nxd5 8.Bxd5 gxh4 9.g3 hxg3 10.Rxh8 gxf2+ 11.Kxf2 Qf6+ 12.Ke2 Nd4+ 13.Ke3 Qg5+ 14.Kd3 14.Qg3+ Kc4 15.b5# {0-1}