Does this want to be a noir whodunit detective story? A murim power fantasy? A found family, rebuilding-the-sect slice of life?
The MC doesn't read like an MC. He tries to act like one but, boy, reality is not only realistic and NOT friendly towards this slacker but everyone doesn't instantly fall for his "charms". Or severe lack thereof.
He acts exactly like those "hidden master" MCs who can normally get away with being annoying goofballs and who'll intrigue the "mysterious beauty" except no one is following that script. Dude is wrong genre savvy as of ch. 10.
At this point, the character should show some kind of god-tier skill or batshit insane, effective strategy OR we see events from his own view where it's obvious he has some kind of plan. This story and this MC has none of that.
If you have zero interest in a weak-to-strong character arc, no power fantasy, OP Mary Sue/Gary Stu character, and want realistic outcome of how everyone disrespects but still cares for a good-for-nothing who continues to act like a loser for waaaaay too long then this may be the manhwa for you.
EDIT: Not sure who put in "weak to strong" but so far there's not even a hint of that in these 10 chapters...and if this is complete at 100 chapters then this story needs to stop with how weak MC is. It should have started the the training/power-up montage in ch 09 or MC becoming skilled later on will really read like an out-of-nowhere asspull.