RE: What should I do?
So you're upset that you had one of the best RC pilots in Illinois assemble, test fly, and trim you're new airplane for you, at a rate of probably $50/hour or less?
Put yourself in his position. What would your time be worth? The lowest bidder isn't always the best. I'd be willing to bet that the other shop would not have taken the time to make sure the plane was properly balanced (the only way to check is by flying), the engine was tuned, the control throws were set in the correct range, any covering wrinkles were heated out, edges sealed, and any one of a hundred other things experienced pilots do with ARFs.
I'd say you got a bargain!
Brad