Taka seems to fit well into this life of a mob boss- but if he had a choice to leave everything behind would he willingly take on a 'normal' life free of that crime world? Does he feel some sort of bitterness towards people who have that freedom, or jealousy? Or does he just think that would be a waste of time?
In another world would he still end up in a life of crime even with normal parents?
Lashing out doesn't necessarily make him feel more important- it does to some degree offer control over it, but the main reason that he harms others is because his sister god created and loves mortals (Serafina). He is furious with her for turning her back on him when he needed her, and takes it out on her creations without regard for how they feel because he lacks the ability to understand how mortals can enjoy such a short,meaningless life. In the past- he has made attempts to understand- so its not without effort to be kind towards others. However these attempts failed or just met with humans ignoring or spurning him, and doing nothing to help in his understanding of them (wrong people at the wrong time) and he's grown increasingly frustrated to the point of giving up on them entirely.
In theory, someone could probably change his mind and help him to understand with a little patience and willingness to compromise with him, but it would have to be one hell of a person to get through to him at this point, as he's been molded by many years of neglect from those he viewed as family.
He's been caught in lies before, but his response to being caught is to just...lie more. If anything he'd probably be entertained more than angry to be caught lying.