I bought a car from Jack and would definitely do so again. He's a really great guy and he's easy to work with--a real natural when it comes to sales.
Car dealerships are snake pits, you have to know that going in and try not to get bitten. They are in the business of separating you from as much of your money as they can legally get away with.
I dealt with Matt when I bought my previous car there and he seemed like an okay guy to me. I'm sorry you had a bad experience, but can anyone have a good experience buying a car?