I'll wait for it then in future chapters.Right now I just don't like how he's being treated by his "mother". I hope it changes in future and he just doesn't forgive her first time she says sorry

I'm enjoying this novel very much but leveling system is not making any sense to me. it is said that belgapgor only knew martial realms till world transformation and it took all gods and devils to defeat him then MC's slaves are only 3 realms below him but are just level 4000 which is even lower than cannon fodder vampires.what's going on or i didn't understand something?