I used to enjoy watching his show despite the man's flaws and his friendship with creatures like Ann Coulter, but I finally started getting fed up a few years ago when he had Steve Bannon on for his opening interview guest.
Bill had what he thought would be some "gotcha" questions, but Bannon responded with a rapid stream of rightwing spin and logical fallacies for which Maher was totally unprepared. He would just say "OK" then go on to the next question and get totally outclassed again by his evil guest who was clearly more intelligent. All that Bill Maher accomplished was to provide a platform for Steve Bannon and undermine his own ostensible cause.
The final breaking points were his war against woke and college students who are genuinely and justly appalled by the wanton slaughter of Palestinian non-combatants, women, and children by the Netanyahu regime.
Maher essentially reinforced Republican talking points by ascribing the most extreme elements of woke culture warriors and the pro-Palestine movement to the broad spectrum of good people who care about justice and human rights. He thusly characterizes the entire "Left" -- and by extension the Democratic Party and major universities -- by the handful of bad examples he loves to feature on his show.
Essentially, Bill Maher is carrying water for the political operatives who made possible the rise of Donald Trump. Either his "sane voice on the Left" has intentionally been a false flag all along, or his brain is too calcified to realize he's become a useful idiot for the fascist Right.
Special hatred is reserved for the enemy within, who pretends to be our ally while undermining our cause.