Rude / borderline crazy owner pretending to be a c...

Rude / borderline crazy owner pretending to be a competent sales person running a legitimate business. When I walked into the store, the owner was screaming at another customer who had (calmly and reasonably) asked for his money back for a defective bike that he purchased.

When you ask for one of their mechanics to look at an issue with your bike (a bike that you had just purchased from them 3 weeks ago), the owner respond and say "sorry, our mechanics don't know how to fix bikes...."

Save your mental strength and go somewhere reputable.