Frank’s unnatural storyline is as a result of Larry Linville’s five-year contract was up. Though he was provided a 2-year extension, he turned it down. Allegedly, he felt like he took Frank Burns so far as he might go, and there was not way more character to develop. As in, he seemingly believed Frank’s imply, sarcastic persona was a bit too one-dimensional.
Plus, Frank was heartbroken and felt like he misplaced all sense of function after Margaret broke up with him. The character was largely proven combating with Hawkeye and BJ whereas Margaret went on to marry Donald Penobscott. Frank, sadly, didn’t discover himself one other love curiosity, as he was too hung up on Margaret.