I swear, I ran into a guy/manager like this in my LCS in San Jose back when I was 22 - I put up with it for a few months, but his banshee-like screeds got the best of me, and I was so traumatized, I left the game for the next 8-10 years. Scarring. I was head-shy for quite a while until the beginnings of the internet started to kick in and I realized I didn't actually have to TALK to anyone, you know, in REAL LIFE anymore. Books just showed up to my house like a pizza delivery. No muss, no fuss!!!
Dan