seriously, 5 of reviewers here clearly from the same person. You can tell from the way he wrote his reviews such as writing edit1, edit2, etc... Those reviews is not only to downgrade the novel ratings, misleading new readers, and also to refute other reviewers who gave good ratings. Looks like this guy have too much free time tbh.
Back to serious reviews: imo, personally I like this novel, the protagonist is very lowkey, always have backup strength and hiding his true strength. Maybe some readers will feel that MC is too cowardly, but you have look at MC's perspective, he has unlimited lifespan. It'll be too pathetic if he die midway because of recklessness and waste his immortality like pathetic bug. Anyway MC can slowly get stronger by grinding his time even if it's as slow as turtle.