I have heard about McLean Stevenson leaving M*A*S*H being a bad career move. But I think Larry Linville did worse. Checking In lasted just 4 episodes and the Herbie Love Bug TV show lasted just 5 for a combined total of 9 episodes between the shows. Compare that to Hello, Larry, which lasted 2 seasons for a total of 41 episodes.

Larry Linville Flops
Grandpa Goes To Washington (1978-1979) 11 episodes
Checking In (1981) 4 episodes
Herbie, The Love Bug (1982) 5 episodes
Paper Dolls (1984) 15 episodes

McLean Stevenson Flops
The McLean Stevenson Show (1976-1977) 12 episodes
In The Beginning (1978) 9 episodes
Hello, Larry (1979-1980) 41 episodes
Condo (1983) 13 episodes
Dirty Dancing (1988-1989) 11 episodes

While it's true that McLean Stevenson had more flops than Larry Linville, it was actually Linville who felt the pain hardest than Stevenson, due to Stevenson's flops having at least a greater episode count than Linville's.