We recently plowed through the whole series and when taken all at once it’s really stark how they switched him to likable, then in a later season (6 or 7? I forget) he was suddenly back to a total asshole only not as funny, then they switched him back to likable just to send him off. Then with him gone I found the show funnier if more absurd, until it started to suck again.
Good TV writing is hard. Apparently.