#1 reason, probably because she moves and looks goofy as hell. She's improved tremendously with her striking and she's a legit BJJ Brown, so that certainly takes legit skills. But she's still goofy looking and moves like Goofy still. Why the fuck does this matter if she's starches other bitches out? Well it doesn't, but most Sherdoggies are dudes and looks will matter. I'm not going to lie, I like the prettier chicks too. Although someone like Cybro is an exception as she's a straightup killer who may kill someone in the ring, and that's always exciting.
Brings up #2, which is a lot of insecure dudes can't deal with the fact that there are women who can beat their ass in real life....if they're hot, then that can give them a pass (b/c there's a chance that they can rub their face against the hot chick's boobs before they get knocked the fuck out)...but if they're tough women that can fight and also are physically scary looking, like Cybro, then no..... dudes who can't fight, can't live with this, and they certainly don't watch MMA to aspire to be like a tough girl...that's also why there's so much hate for Mighty Mouse too...not many aspire to be like a tough small guy....and this extends to goofy chicks too, because they usually get bullied for it, but now that they can fight back...then that won't be tolerated in male fantasies. That's why Cyborg never seems to get a break from her PED usage vs. male fighters that were caught....and Holly Holm has a smoking body + sweet ass.
I personally think that Roxanne is an exceptionally nice person and a good fighter. The goofy movements is still a turnoff. Like Miesha Tate, who moves like Frankenstein Monster, strikes like shit....but she's very hot for a female fighter. I like her much more than Roxanne....and there's no fucking other explanation other than it's her sex appeal. And why else would she get a boob job, especially being a fighter.....I bet those things can pop and cause serious internal complications. Yea it sucks, but that's just real life.