I'm hearing a ton about how simple the plot was and how weak the "Main Villian" was. This is my opinion on said plot and what I got from the movie.
The Suicide Squad isn't put together to stop Enchantress. They're put together to go into Midway city and save "The most important person in the city- Amanda Waller." That's why Deadshot says, "I don't know if you know this but I'm a hitman. I don't save people."
Once they have Waller she tells Flagg, "You wouldn't have gotten here without them." To justify her putting the squad together for that mission.
They were done once Waller got in the helicopter. That's why she says, "I'll send another hilo for you!" Because the mission was accomplished. Never does she say to go after Enchantress.
In fact, the Skwad doesn't even know what they're up against until Boomerang tosses his drone boomerang into the building where Enchantress is doing her belly dancing.
The intrigue of the movie is that the "bad" guys actually CHOOSE to try and save the world. It was never their mission. They were free to go once Flagg smashed his headbomb PDA.
As for the villian- Enchantress was a result of Waller's own doing. Waller kept her caged like an animal and got played when she turned on her. As for the Enchantress' plan, it was to make a machine to destroy all of the military zones and cripple the world response so her and her brother could be worshiped as Gods once more. Think of it as a less destructive Ultron or Loki in Avengers. That's why we see military sites and ships being destroyed and not the White House or other civilian targets. She was never to be some incredible villain. Only a different kind to show the dichotomy between what's really bad.
So to anyone who says it was a "weak" villian, you prove that this movie did it's job. You even think the squad are heroes. This movie showed us that not all bad guys are created equal. We have the bad "Gods" that want to take over and rule the world (Enchantress and Incubus), the government baddies that want to use anything they can including metahumans as weapons for their own agenda (Waller), Bad guys that are born with a power they can't control and end up using it for crime (Diablo and Croc), Bad guys that are vigilante killers hellbent on revenge (Katana) Bad guys that do it for the money (Deadshot and Boomerang), and Some bad guys who are just unpredictable psychopaths (Joker and Harley).
So yeah, the plot wasn't as simple as some may have thought.