The thing about the original DOCTOR WHO series is that everyone of almost every age, could watch it and enjoy it; even people who weren't "into" Sci-Fi ! The scripts had hidden "gems" in them and it was a real mind teaser to try to figure out all of the literary and/or historical bits and pieces, and for the science minded, the science too.
Greek & Roman Myths, Bible stories, stuff from the GREAT BOOKS, and of course, real historical bits and pieces were wedged into the scripts, while still telling interesting, exciting stories. And eventually, there were even books put out, which talked about all of the themes that had been used.
Sure the sets, especially very early on, were "cheesey", but then, DOCTOR WHO began in the '60s and American Sci-Fi ( the original STAR TREK, which also used similar themes ) had really crappy/sometimes even silly sets too!
When DW was brought back, the sets and CGI were great, but the stories? Not so much, though every now and again, all of a sudden an episode came along that didn't completely stink on ice and had a teensy bit of history in it. But the PC and "diversity" crap ruined the show; not to mention that most of the actors and actresses mumbled and can't act.
Monty Python was an AMAZING show, when it began, and so were the early movies.
But yes, at the end, the show and the movies became less and less funny and c lever.