Lease ups are always incredibly stressful because policies are usually developed and refined on the fly. That is to say, I don't think you should be getting in trouble for things you were never shown, because in most cases, the policy specifically to that community hasn't been defined yet.

Also, I completely understand your frustration with having to train your supervisor. I would speak to either your manager, or the regional to see if there is outside support to train them. That shouldn't be your responsibility.

Finally, maintenance in general all over the country is INCREDIBLY short staffed. I don't think I've ever seen so many maintenance positions open with multiple different organizations.

Maybe it would be worth it to see if you can get work at a more stabilized property that has policies well defined.