Kevin Nash held the Championship for practically a year. Bad or not, that's impressive. Bret Hart could've easily took it from him at the Royal Rumble if he wasn't getting over in the beginning.
The problem with Nash's run as Champion wasn't Nash, as much as it was some of his opponent's. Sid Vicious wasn't really viewed (at that time) as anything more than a hired monster and nothing more than that for Ted DiBiase.
Nash also spent part of the year in Tag matches with Bam Bam Bigelow. While Bigelow is a good big man wrestler, feuding against Tatanka in Main Event's isn't what I'd consider anything good.
Nash's Summerslam feud was against Mabel, in which as good as Mabel may have been as a big man wrestler.. you simply can't put two of them together and expect anything other than a shit match. Nash couldn't do anything with Mabel, and vise-versa.
Nash's best matches were against people that could help him look his part. The British Bulldog, Bret Hart, Shawn Michaels. They helped Nash look the part. (That part being, a 'Super Heavyweight')
Isn't Nash one of the lowest drawing champions of all time? Maybe it was like with JBL & McMahon wanted to prove people wrong so kept the title on him regardless.
They wanted to get Diesel over instantly, and having him absolutely DESTROY the guy who beat Bret Hart was basically like saying "Diesel could destroy Bret Hart, because he destroyed the guy who beat Hart".
Only Backlund didn't really beat him. He had him in a Chickenwing for about 30 minutes then Mother Of Hart threw in the towel.
Wasn't the late 1999 run for Big Show meant because of his Father's real-life death though? Much like Backlund, I don't believe this reign was ever meant to be anything more than Big Show getting his name in the record books out of memory or respect for his Father. And the feud with Boss Man was a pure joke.
His father had dided years before. It's because WWE had screwed the fans out of a match that would have got everyobody talking (HHH/Rock/Austin, how could it not?). They needed a surprise ending to the show.