It's why nothing sticks to him. Tell people he's a liar, a horrible person etc. etc. and they respond with "yeah we know and don't care."
Rightly or wrongly, people seem to like that they know what they're getting with him. It's the exact same phenomenon that enabled Trump.
People have been conditioned to accept the abhorrent. With the 'woke' screaming hysterically about each and every little stupid thing, day after day, people have fired back against it with their vote.
The constant moaning caused substantial self-harm to all progressive causes due to a complete inability to cherry pick issues of actual importance and show restraint on others for maximum impact. Instead, it's all white noise now - it's why the Tory sleaze stuff made no impact; nobody gives a toss because you moan about absolutely everything so they've been trained not to listen.