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I think the stranger question here is why did you pay $80k for a $60k truck? Chinese math?...
If you paid that much over, hell, you've got a lot more to complain about... like giving $20k away.
I don't think it has anything to do with the incline/decline.
I actually had the same issue with mine withing 24 hours of owning it. It only happen once though. Mine too failed to start after a failed remote start attempt. The first 24 hours of owning the car I could never get a remote start to work.. it would always blink back at me failed. However since then I've had no issues and it remote starts and starts normally every time.