No repair of engine stumbling on new vehicle

Made the mistake of buying with cash. New dakota pickup stumbles at 2400 RPM. westoaks claims it is "characteristic". Brought it back several times with the same problem. P0300 (random misfire) OBD code at 8000 miles. No repair as it is out of warranty. Limited to under 2400 RPM to prevent OBD code and failing smog test. Not the only problem, the others are drivability (lurching at low speed due to slop in the drive train), rear window blew up sitting in the driveway because dodge glued it to the frame rather than using a gasket, fan first position could not blow out a match, transmission failed (lost all gears except fourth) at 200 miles. Had to drive it 75 miles in fourth because the warranty would have left me in the middle of nowhere with no way to get back. No way I would by another dodge or deal with this "dealer".