I think Bambu eventually resolves most issues, but it can take more time and effort from the customer than some are willing to provide.
I would not have given up on the missing spool, but I probably would have taken a picture of the taped-together spools when they arrived. In my experience, Bambu does not ship orders without proper packaging, so the delivery company probably managed to destroy the box.
Warped beds were (are?) a problem, but if you give customer support the evidence they ask for, I expect they will send you a new bed. Mine was not quite as bad as yours, but once they looked at the logs, there was no further argument from them.
Patience will win out in the end.