I think Ryback is going to get a certain amount of hate from some fans no matter what. You have to remember that Ryback's now a star in WWE. It's become something of an unofficial tradition that whenever a wrestler in WWE is in the midst of a push, the haters suddenly decide to come out to bash him for whatever reason. In the 3.5 years I've been posting in WZ, I've yet to see someone this hasn't been applied to despite a previous clamor for some of these wrestlers to be pushed. CM Punk, Daniel Bryan, Cody Rhodes, The Miz, Sheamus, Del Rio, Dolph Ziggler, etc. To varying degrees, all of these wrestlers tend to have a lot of support from people wanting them to get pushed but some of that support seemed to have morphed into hate after a push began.
In the case of Ryback, he has a strike against him that a lot of internet smarks simply won't overlook in this day and age: he's a powerhouse wrestler. A lot of smarks think that you can't wrestle if you're someone that's between the 250 and 300 pound mark. After all, guys that size aren't doing suicide dives or hurricanranas or springboard moonsaults over the top rope, etc. which I guess is supposed to mean that guys like Ryback don't know how to be pro wrestlers.
Ultimately, what Ryback needs is time. He's come a very long way during his rivalries against CM Punk and The Shield. Ryback's character will have to evolve as he goes along because the mostly silent bruiser heel isn't going to get the job done if WWE ever decides to make him WWE or World Heavyweight Champion.