I am sorry, but it drives me crazy how often they call him weak, as if it was his fault!!
He is malnourished, abused both mentally and physically, his ąss is getting ripped every day, he is basically tortured on a daily basis. Do they expect him to stay healthy and lively? I am suprised he still has a will to stay alive.
Spoiler!
Underrated manhwas I recommend:
1. The Foul
2. No Moral (novel as well)
3. Circumstances of fallen lord (novel&manhwa)
4. I'll raise you well in this life
5. One roof two strangers