So.. you overpaid for a car, have bad credit, and overpaid on the payments, and it's their fault? Did you not do a KBB search on the car before you bought it? I'm looking at a car from them right now for $13, 985 that KBB.com says is worth $14, 500 at a dealer, or $10, 900 as a trade in. I have the VIN, and have carfax'ed it as well. Not a salvage title.
Car mileage is YMMV, and quoted directly from the manufacturer. Again, did you not do your research? If they quoted 26MPG, then I bet you ford says 26MPG too. I have a jetta that's quoted as 42MPG but gets 49MPG. YMMV = "YOUR" mileage may vary. Depends on how you drive. If you're getting 21mpg out of a 26mpg car, you're driving it wrong.
Oh, and you had to pay for oil changes? I've never bought a car where oil changes are included, and I'm a grandfather twice over. Only reason I'm looking at drivetime is that medical bills have ruined my credit (don't try to tell me that medical bills can't, if the doctor sells you to a collection agency, then they are no longer "medical bills" they are just "lines of credit" and still count) so I can't get a regular car loan at this time.
So, you had five star, very good hosting, and changed to another company to try to save a few bucks and are surprised they suck?