As someone who thoroughly enjoyed the first 4 seasons and would rewatch the hell out of it till that point, the show by the end of it has far more shite one can point out as compared to the quality stuff from initial seasons. On that basis alone this should never be mentioned anywhere near the best shows of all time. There's literally a plethora of utter failures in terms of pretty much every single aspect of a tv show.
Having said that, I don't think there has ever been anything worse in any tv show ever than the writer who purposely, in his full senses, decided to write the line 'I never really cared much for them' and actually thought that should be the finisher on that 8 season long character arc. Of all the things in the world that person could have written, that's what he decided to go with. I can literally pay 1000 guys to watch the show till that point and write what should be the final quote to end that arc and make it as mind-numbingly dumb, out of character and nonsensical to the point of being a parody and it would never end up as bad as that. That's literally how bad that writing was.
It's pretty much an achievement in itself for the same people who created, directed, wrote and fecking watched the show for half of it's duration to feck it all up in the way they did. Requires a special collection of dimwitted brains.