The problem is that they've gotten old and wanted to change up the formula they felt was stale, so they made two seasons about an election they were sure Hillary would win because Trump was too silly for them
Now if they stuck to the old formula/had the election as a background thing with occasional funny Hillary/Trump quotes coming out of the tv and people not being sure who to vote for because of it it would have been better- then top it off with a post-election episode where Trump is either working on building a space wall to keep out the aliens and maybe the Jewsians are trying to stop him because that would fuck up their reality show or whatever or maybe a post-election episode where they play up the fact that the Trumps and Clintons used to be friends and make it out to be that they were collaborating on some diabolical scheme together or something. Or anything wacky that south park used to be, really.
The problem is where they would have been in their 20s and laughed hard at Bill Clinton getting a blowjob and then lying about it and Congress saying "ur impeached kiddo" they're now much older and they've forgotten how wacky reality can be- they've become more serious and down to earth and so did their comedy.
But maybe more gayfish jokes will recapture the recent past when South park could still make good jokes.