They treat you as you deserved to be treated: As a serf. You let them stomp all over you and still come crawling back to plead with them to let you bank with them. Even though there's hundreds of banks you can switch to.

If anything even remotely similar happened to me, I'll instantly close all accounts and move my business to another bank.

Same. Find a different bank not full of morons. It's not like there's a shortage of banks out there.