You have to watch this anime given expectations of what this is. It's an anime about Suicide Squad in an isekai. This anime is very clearly not taking itself very seriously and not looking to be anything groundbreaking. The more you just play along with the insanity the more fun and enjoy it you'll have.
The plot is fairly simply and standard for an isekai. Nothing revolutionary. As for its faithfulness to the DC source material, I would say it's like fairly loose with the characters. The background and overall feel of the characters stay pretty much in tact, but the writers definitely took liberties with their character personality at times. I would say try not to be a diehard DC fan while watching this. If you are going to get agitated with your favorite characters being different from the Comics, you should probably stay away form this show.
As for the animation for the first season, I will say that the animation is fairly rough for the first 5 episodes, especially that 5th episode (yikes). However, it would seem the animation budget went into the last 5 episodes, as Wit Studios really kicked it up a notch with the animations, so don't get to discouraged about the animations after watching the first 5 like most of the reviewers.
Overall, it was a fun 10 episodes to watch. It doesn't take itself very seriously and neither should you when watching it. If you have nothing to watch and want something to pass the time, I would say give this a crack especially given it's currently only 10 episodes.
