Since Randy Orton turned face, he has been given absolutely nothing to work with. After Mania, he had a thrown together match with Swagger at Extreme Rules for a title that belonged to the show he wasn't even apart of.
After that, he went on to have a completely uninteresting, random feud with Edge. It had zero creativity, and the matches were not that great (Edge was pretty out of shape). Their promo's were few and far between, and meant nothing. There was zero emotion, zero creativity in the way that feud was written. That (sort of) ended at the next PPV (Over the Limit), and was a complete failure, IMO.
Then at Fatal Fourway, another emotionless WWE PPV, he was involved in a 4-Way match for the title, once again having absolutely nothing to work with in terms of building an actual feud/storyline.
What happened next? You guessed it; another multi-person match at Money In The Bank, with the same shit happening that took place before Fatal Fourway. After that debacle, he went on to feud with Sheamus. Neither men were given anything compelling to work with, in terms of an actual story, and this continued through Summerslam. Then we had Night Of Champions, another PPV-idea that kills the notion of having any type of storyline. Orton wins the title in the most uneventful fashion possible, because there was ZERO build and ZERO emotion.
Orton and Sheamus continue through Hell in a Cell, and still had nothing to feud about. It was completely competition-based. How can someone, either guy, cut a decent promo when no real feud has been established by the creative department? Decent HIAC match, but the PG-rating puts a huge constraint on what WWE chooses to do with those cell matches.
That takes us to the present. Orton has a title defense tonight against Wade Barrett. Orton, the CHAMPION, has been completely ignored during this entire feud. The whole thing has centered around Barrett/Cena. How in the hell does WWE expect their champion to stay hot if he isn't even involved in his own storyline? This feud, for Orton, has been terrible. Why? Because it hasn't been a feud, not at all.
I hope you see what I'm getting at here. I cannot recall when the WWE creative team has been so..uncreative when it comes to their babyface champion. This guy has been getting the #1 ovation of any wrestler out there for months now. The crowd is more than jacked everytime this guy comes out. What does he, and his fans get in return? Nothing. This is why so many on the internet are sick of the guy. They think his face turn sucks! Why? Because it has! It's not his fault, not at all, IMO. Give the guy something compelling to do, for the love of Christ!
EDIT: Also add in Cena-fans who are probably not very happy with Orton receiving this push, and/or getting the biggest pop each time they are on television.