#1. Rusev hated John Cena for many years
Rusev admitted that he went to a show in San Diego a few years ago when he was still just a fan and he saw John Cena. He said he was just leaving as Cena pulled into the same place and he started shouting and waving to him, for Cena to just respond with a wave and nod of his own.
Rusev said that he thought that this was John Cena looking down on him and for years he absolutely hated him for it. It was only when he met him as a wrestler that he realised that Cena was actually being polite and saying "hey" back to him.
A top AEW star just called one of his colleagues 'spoiled' and 'narcissistic' HERE.
It seems that the epic Rusev/John Cena feud that ended Rusev's undefeated streak back in 2015 actually began years before it was ever televised.