That's three and a half years, wouldn't say that's a "short" time. Besides, I acknowledged he was not as "consistent," but like I said at their respective bests Nasser > Levrone.
Similarly, when discussing Dorian vs. Ronnie nobody compares Dorian of 97 or Ronnie of 2006 or after; you discuss their respective prime.
His placings began to fall after his divorce with his wife, who he no longer had to support him in getting ready for shows, preparing meals, etc. and in general his motivation declined and he started feeling fed with the politics.
I won't get into a debate as to whether or not three and a half years is a short amount of time. Nor will I shove down your throat that WINS count for something...not just seconds and thirds. Even if second and thirds were of great importance, Kevin registered FOUR runner-up placements at the Olympia...and 10 years apart from his first to last!
Kevin finished second in 1992, 1995, 2000, 2002. Kevin also did not humiliate himself at the end of his career as Nasser did. Kevin finished in 3rd place at the 2003 GNC with a torn tricep, then left bodybuilding with his head held up high.
Kevin also won the Arnold Classic twice to Nasser's one time. Kevin held the IFBB record for pro wins for a time with 22.
As great as Nasser was (and I will admit he was an incredible bodybuilder and should have won the Olympia in 1997), he does not have a body of work like Kevin. If we are comparing their peak, it's impossible to say which is better...although I think most people will prefer Kevin's physique. Both men were great and would dominate today's IFBB bodybuilders. The competition today is WEAK compared to the 90s and early 2000s.