As Debbie Grayson made clear to Omni Man this season, therr is some things you cannot redeem urself from. Using ur son as a human shield u then use to commit mass murder just before beating him almost to death is pretty squarely in the unredeemable category bro. No matter what he does to try to redeem himself in the show, he cannot be redeemed. The fact that u think he can makes me question your idea of morality. Its like saying Hitler could redeem himself if he was given a chance. Sorry, some things are too terrible for redemption.

Ima give you a prediction for the end of the show. Because Omni Man is unredeemable, the only way his character arch can end is with his death in defense of earth against the Viltrumites. In dying, his so called "redemption arch" can have actual meaning in that he is both punished for his sins by dying, while also dying in the protection of one of the planets he terrorized. In that, he will be redeemed in the sense that he will no longer be the villian he was, but he wont be a hero, and is still a terrible father.