It was much better back in the first one to two seasons (remember the really good old days when Richie had his older brother, Chuck?).
As a kid, I watched the show a lot in reruns in the late ‘70s & early ‘80s. The memory-holing of Chuck kinda disturbed me at the time. How does a family member just disappear without any of the others ever noticing or apparently missing him?
IIRC Chuck was only around for 4 eps, not even a whole season.