Why would feminism have ruined it?
I suspect what has changed is:
A: We're not wearing rose tinted glasses when looking at current TV vs the past.
B: Tastes have changed and there is a lot more variety in what is available - no longer does vast swathes of the population settle for the same content and have the same general taste (which fragmented the audience rather a lot).
C: There are so many different channels that the money isn't there for the commercial ones to put the money in that they used to (ITV's hayday for it's holiday content was probably back int the day of the competing regions when their income was much higher in real terms and they competed between themselves to get content that was good enough for the other regions to pick up).
The actual basic schedules haven't really changed much, neither has the sort of shows that get the most viewers compared to the past, there is still the big comedy act, a new Drama adaptation, the "christmas special" episodes of popular shows, some major network premiers of films, the popular older "holiday" films etc.
Personally I don't find a great deal of the holiday content to be great, but I never have, on the other hand I always seem to find a few films to watch, and a few new bits of drama/comedy content that I like (my favourite holiday TV time was probably the 90's with the Two Ronnies, and Only Fools and Horses as the comedy, then a few films etc).