Awakening to a Special-Grade Explorer ~A Young Man Who Has Been Cut Off as a Lizard’s Tail Becomes the King of Hell and Is Unmatched~ Chapter v252 Discussion

There is slow progression, and then there's this series.

52 chapters and the MC still hasn't done anything of note, at most he reacted to stuff other people did. In fact, the MC actively avoids doing anything that would move the story ahead or would benefit him otherwise. The people around the MC always talk in riddles which feels rather forced and the MC does nothing to understand what they're on about, as if he didn't care. But if he didn't care, he wouldn't actually need to interact with them, so there's zero pressure on him, the story lacks any conflict of note, as if it didn't matter what anyone did at all times.

It's rare to see such a passive protagonist.