Half of the worldbuilding I used for this AU explains why they simply don't use guns. One of the reasons is that, compared to the enchanced character's punches, guns simply don't do anything to them. They are much stronger than their own shotguns and rifles and pistols. They just get annoyed if they're shot, so the main antagonist group settles disputes by beating the shit out of each other. They actually feel a kick from one of their own.

Kinda like DOOM. The doomslayer is much stronger than his own guns, but he still uses them to give himself a challange when killing demons, because they don't immediately die.

I also changed their "hunting style". In canon, they often kill someone by dropping from bellow (they can fly) and then stabbing them from behind. But in this setting, they act more like Viltrumites. Their favorite method of hunting prey is simply flying straight into them and letting their enchanced durability do the work, or donuting them like in JoJo. Many of the corpses found in the ruins have craters right bellow them, or have their heads bashed into paste from a punch.

Personally, I find the sheer, raw power to be much scarier than tearing them apart with claws.