‘Tarnished for ever’: why don’t great TV shows ever end well?

Line of Duty, Game of Thrones, Lost, Dexter ... so much TV goes from fan favourite to laughing stock the second its finale ends. Has any show ever stuck the landing?
Read more: https://www.theguardian.com/tv-and-radio/2021/may/04/tarnished-forever-why-dont-tv-shows-ever-end-well-line-of-duty-game-of-thrones-lost?source=Snapzu