This novel is packed with a bunch of issues:
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everything in the story seems to revolve around MC. Even though the story takes place in a world that's been around for hundreds of thousands of years, as soon as the MC enters the scene, two races are suddenly on the brink of extinction. And of course, The MC has to play the biggest role in saving them. On top of that, for some really dumb reason, everyone in the world is after the MC. And I really want to emphasize that it's a "dumb reason," because the author keeps using dumb reasons to make everybody hunt him.
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2. the main character keeps getting stronger and stronger because he keeps getting all sorts of cool stuff. But strangely, he struggles when going up against someone who's only a little more powerful.
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3. The translation is terrible. It's one of the worst translations I've come across out of the many hundreds of novels I've read.
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There's actually more to gripe about, but I've run out of space to list them all.