Dude, take it from me, it's not worth it. I understand your frustration because like I said, no one wants to see their fave being bashed/insulted, but you have to realize it's not just Rihanna gettin' clocked, it's every celeb. I have heard people call Lady Gaga talentless, Nicki Minaj talentless, Britney Spears talentless (esp. on YouTube for "lip singing" on tour), and etc. And I realize, you can't even get mad because everyone's entitled to their opinion (even though I don't understand why someone would constantly stay updated on someone they claim to "hate," but that's a different story for a different day).
Rihanna has you, her fans and that's all that really matters. People are going to talk trash about her regardless. It's best to just ignore it and just focus on your fave/stan base. That's what I've done. I don't got time to be arguing with no one, when we're just going to get nowhere. Because at the end, I'm still going to love my fave, and you're still going to dislike my fave, so where did we really get with wasting hours of time in an argument if **** remains unchanged?
Just food for thought!
btw, I'm not a fan of RiRi but I definitely don't think she's talentless. I mean if she were, I don't think she'd be still relevant 7 years later.