Anton offered Carla Jean a coin-toss cause he Knew he was wrong?

Probably not but...the kill is unearned and should be unneccessary....For all his talk,he had nothing to do with Moss´ demise,killed by people who likely would´ve killed Anton too. They went toe-to-toe and Moss held his own(In the film atleast)...So how does he justifie this murder as a necessity when he really didn´t deliver on his implied threat?Too compensate and feel better about himself?

Would he straight up killed Carla Jean had HE murdered Moss? -"I´m not gonna say you can save yourself...cause you can´t." Wow...big talk.Or was he referring to too many people wanting Moss dead and death by anyones hand was inevitable?

Yes,I KNOW he´s a psychopath but he more seems a sadistic,soar loser than a"morally"obligated killer here,giving her an out,he showed a little mercy cause he knows he had little reason or right by any standards,even his own to kill her?

Moss got overconfident due to ego and rage and failed but that doesn´t mean he was just trying to save himself. Sure,I get a second confrontation would ruin the point and impact of the story.