like the Berserkers who betrayed Choi Hyuk despite knowing that they would lose in the face of his powerful might after killing the monster responsible for his mother's death. These warriors were taken in because they wanted to die, so when Hyuk's enemies asked them to betray him they openly mocked those enemies for thinking they could actually kill Choi Hyuk, yet they agreed to betray him because they wanted to die anyway. Even Hyuk knew why they betrayed him because he understood them the best as one whose world no longer existed and could not hate them for it; he welcomed their betrayals and personally sent them on their way after a cool "You did well." It made me really respect both the traitors and Choi Hyuk as a leader.
He isn't improving them for them, but for himself because the ones at the top (which are obviously the subjects of his revenge) categorize the humans as a whole. In the first half of the novel, humans are "Consumables, " trash that could be thrown away anytime. In order to get more power to enact his revenge, Hyuk needs to get rid of that title to get resources. To get rid of this title, all of humanity has to improve themselves, not just Choi Hyuk and his army.
The moment his mother died, his world was over. Sure, he's a momma's boy. So what? I think that's endearing considering she was the only one in his life for 18 (?) years. The deaths following his mother's, he did care but at that point, his world was already gone so nothing else mattered--he just let their deaths become extra fuel for his revenge.
he's happy and he ended up with the best waifu in the novel
Earth arc, where the setting is the apocalypse.
There is the second, Yyer (MTL verbatim) arc, which is another world. It's not really an a$$pull, since the author does a relatively smooth job at transitioning this world traveling concept. Reminds me of Rebirth of MC (??) that one zombie apocalypse novel where the two MC were actually reincarnations of previous lives and later returned the the upper realm and never went back to earth. But BDG is different in that they do return. And they obviously are not reincarnations but reborn from their previous lives. Also, the other world's situation is linked to the earth's apocalypse.
Which brings us to the shorter third arc, where it suddenly turns into a battle between the gods. This is intricately tied to the zombie apocalypse on earth so I can't say that the author pulled this from nowhere. The MCs go back and forth between the two worlds, so there's some interesting business subplots going on as well.
it ended off in the other world with no real coverage of earth. Not too much of a problem, since it's easy to guess but it'd probably have been nice to read about it rather than speculating.
ML is usually super duper doting and spoils the MC like there's no tomorrow. In Yyer, someone made him doubt the MCs love for him (which is actually really understandable since the MC is always on the receiving end and if you know his personality from the released chapters though he changes from the depressed state into a more lively person, he still passively accepts love without having verbally declared his love for ML... It's not strange for his feelings to be doubted) and so ML was slightly overbearing. People might find this abrupt shift hard to read, but tbh ML never did anything MC didn't want. Also, his mood was entirely dependent on his power stability which was already very unstable before he was provoked by that other someone and also relied on his faith in MCs love for him, so mood swings galore at this time. The really borderline thing I'd say would be that he turned slightly yandere due to his possessiveness, not letting MC talk or look at anyone else--not that he ever hurt MC though. But ML only wanted to keep up that act for a month before splitting up with MC. Basically, he wanted a time for just both of them for the last time before splitting since he felt that the MC was unwillingly tied to him and he didn't want to wrong MC. Obviously, they didn't split up and even strengthened their love for each other later.