You’re likely offering “market rate” roles. You’re getting “market rate” candidates and behavior. It’s like walking into a Fiat dealership and being mad you’re not getting Ferrari treatment.
If you want better you are welcome to pay more and then maybe people will have less incentives to ghost you. The Ferrari treatment still exists, you just need to pay for it.
The job market didn't get rude, it just regressed to the mean. "Rude" is the default; when one side shows respect it's likely for the other side to reciprocate. When one side doesn't, there is little reason for the other side to put in the effort.