People are just mad the plot keeps edging them
If we are talking bout actual ages, I think mc is quite old for them. ╥﹏╥
5. the MC isnt a mary sue
6. there is no real (ecchi) harem involved
Older, yes, but not that much. MC is not really that old when he died. He's what, maybe 20 oldest? If we include his age fully remembering, maybe around 30 years old mentally? Definitely older than those teens.
But anyway MC is not really up for romance, so it doesn't really matter. Probably why it's not popular, no harem for the reincarnated old man.
(Yes I'm acknowledging 30 years as old. It is what it is.)
I swear these people and their ecchi harem kinks. Probably doesn't even have a game irl.
1. The art is not as crispy as the other popular manhwas.
2. MC is not as ikemen as other action fantasy manhwa MCs.
3. People are annoyed at the existence of female characters close to MC's ages.
4. The translation could be better.
Story-wise, it's a good read. I'm honestly a sucker for reincarnated MCs, especially the angsty flashbacks and fleeting nostalgic memories.