After 2.Qxe5 Nxe5 White is tactically unable to maintain the bishop pair.
Thanks to his active queen and the unsafe location of White's king, Black has considerable counterplay.
Swapping pieces to reach an endgame where the weak pawns on c3 and a2 will speak in Black's favour.
Preferable was 2.Rxe5 Bd6 3.Re2, followed by Qf3, keeping the queens on the board.
Preparing 2 Bxf5 and 3 Bd4 in order to exchange as many pieces as possible, considering the opponent's isolated pawn.
2...Qxf5 3.Nd4 Bxd4 4.Bxd4 White is also slightly better, thanks to his active bishop and Black's isolated pawn.