UPDATE
Thanks, everyone. I received an apology from Amtrak customer service and was informed that Amtrak has added the information to its "customer database" and shared the information with management.
I had previously bought a few more tickets on the same train that the hostile sleeping car attendant seems to work on. I assume that he'll come at me with a vengeance next time I'm onboard, so I think I'm going to try to get those tickets refunded and just not take Amtrak again.