The guy's a cheater, a bully, delusional and beats his wife if she's still living. He's the kind of guy you hire to drown kittens. I don't know a thing about flex league but assume it's matches made up through a computer--tennis and computers don't mix!
What do you get if you win flex league? Unless it's a trip to Hawaii why bother? You'd be better off hanging out at a public tennis center if you don't want to join a club--or hit against a wall or a basket of serves. That "Let's be gentlemen", line was pretty funny though. If you want competition sign up for a tournament where at least you have tournament officials to deal with cheaters. You have my condolences. This was not tennis.
"...the human emotional system was not designed to endure the mental rigors of a tennis match." Dr. Allen Fox