https://www.nickiswift.com/2185228/why-so-many-mash-cast-members-left-the-show/

You might not remember some of these actors who disappeared from "M*A*S*H" before the series ended, but others played some of its most popular characters.

Maybe they didnt like the disrespect the show got by the adding of a laugh track!

THAT SHOW WASNT MEANT TO BE A JOKE FOR PPL TO LAUGH AT!!