Remember, when Enchantress (Cara Delevingne) shows him his ultimate fantasy, he sees a revisionist version of history in which he actually manages to gun down Batman in a Gotham City alleyway.
One very important thing that we tend to forget about the end of Suicide Squad is the fact that Floyd Lawton doesn’t really learn anything.
His hatred for The Dark Knight is so intense that the brutal murder of the vigilante plays into his perfect life with his daughter, and that’s worth exploring further.
Yes, he saves the world and he redeems himself in the eyes of his daughter, but at the end of the day he is still a paid killer who seems to take pride in his work.