Wonder how much money they lost with that awful ending to "The Sopranos". I was going to buy the series, but changed my mind with the way it ended. I certainly can't be the only one who passed on it.
Other shows that I HATED the ending to that are similar come to mind like Chuck. For me, many shows have ended on seasons that were not the "offical" ending. If they stopped Chuck after Season 3 it would've been much better to me as a much happier and solid conclusion.
The one BIG show that some will disagree with is MASH and the direction it went after Season 7. It would've been much better to wrap it up with the 2 hour movie/finale then with Radar still there and Klinger in his traditional cross-dressing nutty role. When he took the place of Radar and became serious it didn't work at all. Also, another example where the remaining seasons went drastically down hill, just going though the motions.