Do you think I got screwed, or is it just part of the hobby?

Sorry to hear about this. That sucks.

My experience with roundy round shops has been universally bad.

Usually when I've seen people in situations like this the shop ends up squeaking some money of out them for the rebuild and they end up still having problems down the road.

I'd pull it and take it to a different shop that actually does Mopars and have them figure out what went wrong. Once you've got a diagnosis, you can start fighting with the original shop.

Steve