The series was actually great the first few years. Gelbart and Reynolds did the writing, and it was usually 3 stories going on at the same time, very funny. After Blake and Rogers left, less funny, and losing Frank it went way down. But the real key to the downfall was Alan Alda taking control of the show, that ego maniac ruined it.
Little trivia you probably already know, the only person in both the film and series was Gary Burghoff.
I miss early 70’s TV. Odd Couple and Barney Miller were also brilliant.