That depends on when he sent the 20+ CCs. If it was on his first try to get attention, he should be fired.
I seriously doubt that the Captain sent the copies out simultaneously it’s asking his chain of command for help - remember that it was known that he coronavirus patients aboard at least a week before he pulled the fire alarm.
During my military career, I “skylined” superiors at least twice to get the job done: once when I was second lieutenant when a corrupt squadron commander refused to hold his Marines responsible for criminal activities - he was relieved of his command and second time when I was acting G-4 for the First Marine Division in ‘93 when the Division wasn’t getting their mail in Somalia - and they’d been there for a month. Told the pentagon’s Head of Postal Affairs that his face was going to be on CNN if he didn’t get the system squared away by the next morning.
He did.