Kalashnikov Sicilian - causes simple blunder

Here is a game where my opponent needs to play the simple Qc1 on move 22, but instead they blunder their Queen by moving it to e3??  

The lesson from this game, is that you need to learn your openings to succeed at chess!!  Even if you only learn the basics ... As can be seen early on, my opponent actually move the same piece (Knight) twice in the opening.  This is normally frowned upon in chess ... 

 

He ends the game with some 'suicide' moves!!