Being in full-out hysteria mode, he's not able to accurately describe his experience, such that people could actually help him.
He also, my guess, sees any mail from the listserv as an offense. That probably includes the unsubscription confirmation mails that have been sent to him. There would have been two of them today, at least. (Since anyone can initiate that process, at least two of us have done it.)

I'd guess that he's not reading any of this list mail describing his problem and giving advice how to unsubscribe, nor is he reading and following instructions in the unsubscription confirmation mail.

He doesn't seem to understand that he is dealing with a robot, that can only follow its programming. So he sends an unsubscription command by email, or uses the unsubscribe button on-line, but isn't careful to read the instructions, and doesn't respond as directed to the unsubscription confirmation mail.

He has not actually unsubscribed once, it's highly likely. Certainly not a million times....

Being focused only on his own survival needs -- that's what the amygdala is for -- he hasn't considered that list servers must confirm, in some way, that an unsubscription command actually comes from the subscribed mail. It does this in two ways: either the command is entered while logged-in with the password, or a mail is sent to the involved mailing address, containing a confirmation code. There are then two ways to complete the unsubscription, and simply replying to the mail with the subject header unchanged and no response text will do it. It's simple, but it must be done in a way that the listserv robot can recognize. Yelling is like yelling at a tree, or, more to the point, your computer or someone else's computer. Some day we will have computers that respond to yelling. Not yet, or, at least, not this listserv.