Ugh, the guy has mania.... most likely a true medical bipolar disorder that has been gong unchecked because our system doesn't get people the help they need and instead incarcerates them.
Mayhem needs medication. Watch him on Joe Rogans podcast from a few years back and you see a man who is incapable of sitting still, focusing on a subject, or hold any control over his own thought process. All that is okay if you are at least able to calm your actions when necessary. It has been made clear through years of examples that Miller cannot do that.