Review Detail of SR_2027 in The Villainess and I, her Zombie

The story and background is good but here the main problem: Mc is an adult in previous life, now as a child and even as a zombie, I see no difference in his inteligence! his IQ is at the bottom and he started to call the girl or necromancer 'master' for god no why. Even acts like a child and things and most importantly he gets severely abused after becoming a zombie and he never even fight back. Since he doesn't feel pain, why not just become a lazy zombie Even when you get abused as he will not feel any pain... Even if he is killed, at least he will not have to live a life like a slave having worse life then being alive. I dropped reading it after the awakening ark. it's just... just boring? I read it to know a little about plot as my collection were completed and I came accross it. it's just too horrible.