Fun fact most of Jon Jones opponents were vets in their 30's winning fights while Jon Jones was a rookie 23-27 beating them all.
No one who was a fan of the sport past 2009 is dumb enough to believe what you just wrote wasn't bs, before 2015 light heavyweight was the most stacked incision in the UFC. Jon Jones beat all his opponents at their peek comming off winning streaks. Former world champions who beat each other and they all lost to the one true GOAT. No one is going to argue that Rashad Evans, Lyoto Machida, Rampage Jackson, Vitor Belfort Chael Sonnen were past their primes in 2012 -2013.
If you want to point out a fighter who looked like shit pre USADA but is doing well against old past their prime heavyweights in their late 30's and got rocked by a novice in Francis ngannou you have your answer in Stipe Miocic.