I had the same experience with “The Jack Benny Show”. I used to love it then began watching it on some rerun channel and it didn’t seem very good.
Then after a week or so, it got better and better. I think you sort of have to get into the feel of the show again.
BTW, “Rockford Files” was one of the all time greats. James Garner was another Hollywood liberal. I just ignore that and enjoyed the show.
Now if they are really in your face about it like Jane Fonda or Sean Penn, then it is just too hard to ignore their politics.
Funny is funny. There are no age barriers. When I was a kid we used to watch and laugh at Jack Benny, The Three Stooges, and all the other well-known comedians many of whom were thirty-sixty years older than me. I find it strange that many young people today will not watch anyone not much older than themselves. I don't know if young people (usually males) today still watch the Stooges. I remember one time in the nineties talking to some young people at work and mentioning John Belushi. One them, who was about twenty years old, asked me who he was.