Ginger from Gilligan’s Island didn’t leave, I guess, but always complained about how that series ruined her chance to be a big star.
Also, Don Adams was sort of stuck after Get Smart because he was typecast.
He had a good run as Tennessee Tuxedo, or maybe that was before Get Smart
There's two way of looking at that. He became a huge, wealthy star from "Get Smart." His tv experience previous to "Get Smart" was as a house dick on a quickly canceled sitcom "The Bill Dana Show." Would he rather have labored in obscurity or become one of tv's most famous comedians?
I don't know if Adams bemoaned his fate, but any actor who actually becomes famous through the efforts of just one show should be happy. There's tons more unemployed or underemployed actors. You can make money strumming a guitar on a streetcorner, but nobody wants to hear some actor do scenes from Hamlet while they're walking around the shopping district.