If you are unfamiliar with how Rotten Tomatoes works, it gathers reviews from other sites and marks them as "rotten" (negative) or "fresh" (positive), and then gives the movie a percentage based on the outcome.
Suicide Squad is currently "rotten" as only 35% of the current reviews are considered "fresh" (24 positive out of 68 total reviews), which isn't sitting well with the fans.
If you've ever surveyed Reddit, Twitter, Facebook, or various forums, you'll see some fans posting accusations that many of the sites that do the reviews are pro-Disney and such (shill sites). While there isn't any proof of some conspiracy, after all, Rotten Tomatoes is partly owned by the movie studio that put out Suicide Squad with Warner Bros., there have been claims that reviewers jump on the "bandwagon" (particularly with Batman Vs. Superman) and post reviews based on trends in order to increase page views.
Now a petition has been started by DC fans asking to take down Rotten Tomatoes, which currently has amassed just about 7000 signatures. The petition accuses Rotten Tomatoes of giving "unjust bad reviews like Batman vs. Superman [and] Suicide Squad that affects people's opinion even if it's a really great [movie].”
Regarding Batman Vs. Superman, reviews gathered by Rotten Tomatoes gave it 27 percent positive rating, but what's rather interesting is that they gave Captain America: Civil War - a rather dull movie in my mind - a whopping 90 percent favorable outcome.
"Suicide Squad" has an August 5, 2016 release date directed by David Ayer starring Will Smith as Deadshot, Jared Leto as the Joker, Margot Robbie as Harley Quinn, Cara Delevingne as Enchantress, Jai Courtney as Boomerang, Joel Kinnaman as Rick Flag, Viola Davis as Amanda Waller, Adam Beach as Slipknot, Karen Fukuhara as Katana, Adewale Akinnuoye-Agbaje as Killer Croc, Jay Hernandez as El Diablo, and Scott Eastwood in an unknown role.
It feels good to be bad… Assemble a team of the world’s most dangerous, incarcerated Supervillains, provide them with the most powerful arsenal at the government’s disposal, and send them off on a mission to defeat an enigmatic, insuperable entity. U.S. intelligence officer Amanda Waller has determined only a secretly convened group of disparate, despicable individuals with next to nothing to lose will do. However, once they realize they weren’t picked to succeed but chosen for their patent culpability when they inevitably fail, will the Suicide Squad resolve to die trying, or decide it’s every man for himself?