Okay, I've seen some characterisations of Moreau as this innocent poor bean who just wants to be liked.
And while I don't wanna rain on anyone's parade, I just feel like that isn't entirely correct.
Getting mother Miranda's approval certainly seems his main goal, yeah. But that doesn't mean he's just some naive sweet bean starved for affection. He still murders innocent people without any issue.
I think he's well-aware of how people see him. Something disgusting to stay away from and maybe vaguely pity. And he uses this for his own gain. (for example to stall Ethan, before actively making fun of him for falling for the ruse).
But I don't think he likes it. I think he hates how he looks, he hates that people see him as disgusting and pitiful, and don't take him seriously. They underestimate him, which is useful, but I think that leads to a lot of loathing. Loathing of others, for seeing and treating him this way, and loathing for himself, for playing the role strategically, instead of trying to change the situation he's unhappy with. And all that loathing leads to destructive desperate anger and hate.