#2 Rusev
It legitimately saddens me to see how far down the card Rusev has fallen since his debut.
I mean, surely you all remember when Rusev went un-pinned for almost a full calendar year, right? Remember how he was being groomed to be one of the company's top heels? How they teased main event feuds between him and Roman Reigns on multiple occasions?
What the hell went wrong?
Well, after Rusev lost his United States Championship to John Cena at WrestleMania 31 (and then lost the two subsequent rematches on PPV), his career took somewhat of a tailspin. Sure, he was still pretty dominant, but his armour had been cracked. After earning some heat backstage for getting real-life engaged to his now-wife Lana when he was supposed to be feuding with her (yes, WWE is that petty), he continued to flounder.
And 2017 has been no different. In fact, this year has been Rusev's worst year by far. He started off this year with a PPV loss to The Big Show at Fastlane, got injured, told the fans that he wouldn't come back to SmackDown unless he was granted a WWE Championship opportunity at Money in the Bank, scrapped those plans and debuted anyway, lost to John Cena in his first PPV match back from injury, lost to Randy Orton in ten seconds at SummerSlam, then lost again to Orton at Hell in a Cell.
Needless to say, this is a grave injustice against one of the most entertaining superstars on the roster. Rusev could easily be a main-event player if WWE could just pull the trigger on him and re-establish him as the monster he once was.