I think I figured out what's going on. This guy is so delusional, he thinks that no matter what a drummer is playing, it's Don't Ever Wanna Lose Ya being played incorrectly.Well he told me every drummer in the world plays it and in the video he says they do and all play it wrong.
Customer #1: [plays the intro to Rock and Roll by Led Zeppelin]
GC Manager: No, no, no, you're playing it all wrong! Don't Ever Wanna Lose Ya sounds nothing like that!
Customer #2: [starts playing Tom Sawyer]
GC Manager: Wow, these drummers have NO IDEA how to play Don't Ever Wanna Lose Ya
Customer #3: [plays the Rosanna shuffle flawlessly]
GC Manager: Hmmm, I don't remember sounding THAT good on Don't Ever Wanna Lose Ya, but it's STILL WRONG!
Customer #4: [just starts randomly bashing away at the kit]
GC Manager: Now I'm super convinced that NO ONE can play Don't Ever Wanna Lose Ya correctly except me! I RULE!!!!!!!
Psychologists call it Don't Wanna Lose Ya Syndrome.