I'm guessing you guys never saw the original MASH movie.
What annoyed me about the TV version was that they took what's really a dark song about suicide and desperation and turned it into a TV jingle - complete with that upbeat little musical diddy at the end.
Of course, that wasn't half as bad what happened to the show when they let Alan Alda start writing, producing, and directing the shows and it went from comedy to serious commentary.
But I digress.
I always thought that the theme song was a bit strange for that show. It starts off as a dark sounding song and the last part of it sounds upbeat. It never really sounded right.