This is really sad, emotions got the better of you buying this car,,, it's not that you got screwed on the rate, but most likely you purchased this vehicle having no credit history , my guess is doing the math your rate is more than 18% ?
Without going into detail trading down will never happen - re-finance for a longer term to lessen payments is 99% out of the question,,, that leaves you with only 2 choices,,, Repo or make payments.