This is more a general complaint about DC's movies than Suicide Squad specifically, but they really need to step up their game here. DC had such a strong push with Nolan's Dark Knight trilogy, but their latest attempts simply pale in comparison to the MCU. They're too stuck in the gritty, dark cinematography fad that Dark Knight popularized. I'm not saying they should copy MCU's feelgood action hero romp, but they should really establish themselves outside of their bubble. Basically, I just think they're taking themselves way too seriously, and it's kind of boring at this point.
They tried to do fun with Green Lantern and fucked that up too. The thing about Marvel is the people running the show understand the characters and have an overall vision for the universe. No one creator has more influence than the company so they can tell Edgar Wright to walk and directors in general are interchangeable. Warner seems to know they're sitting on a pile of money and if they understood their characters we'd already have good movies, Dark Knight aside even though that's the one success and they don't even understand those movies