Doomsday is similar to the novels of the Dark Blood Age.

It was a pity that the Dark Blood Age had stopped updating. There should be quite a number of good post-apocalyptic novels, but they were buried. There should be some that fit the following points.
1. Doomsday is not a biochemical crisis (at least not just zombies, that's not worth watching.) It's the same over and over again. It's best if there are all kinds of monsters like the Dark Blood Age)
2. The protagonist struggled in the end of the world. After experiencing a series of events, he was absolutely rational and indifferent to everything, but there was still humanity in him.
Also, I've read the Demon Hunter's Notes and Dark Sky Devil's novels. I've also found these novels that are very close to them.

Answer 1

There were many novels similar to the Dark Blood Age that could be referred to as the following popular works:
1. Dark Blood Age series. This was a horror novel series between vampires and humans. The story was full of mystery and adventure elements, and the plot was full of thrills and excitement.
What were you doing at the end of the day? Are you free? Can you come and save me?" 。This was a science fiction novel set in the apocalypse. It told the story of a group of young people trying to survive before the apocalypse. It was full of heartwarming and touching plots.
3. The Dark Paladin series. Gold. This was a horror novel series with the theme of humans and vampires. The plot twists and turns were full of thrills and excitement, but there were also many deep thoughts and human nature discussions.
4. Dark Souls series, Preston. This was an action-adventure themed game series. The story background was a dark fantasy world full of challenges and adventures, but there were also many thoughts about humanity and morality.
5 " A Song of Ice and Fire " series, R.R. Martin. This was a fantasy novel series set in the Middle Ages. The plot was complex, full of thrills and excitement, but there were also many thoughts about human nature and morality.