BCBM
I agree with the exception of that one phrase. I don't think JP loves himself,but he does think he should be the one controlling his little Universe. JP probably loathes himself and his life, and he hates those who are better than him in every way.
That's why he hated Susan and the Cox's . Susan was everything good that he was not.
He couldn't let his boys grow up seeing that their father was useless ,weak and pathetic in comparison to their mother.
He hated Susan for bringing in the money that he controlled ,for being a better parent, for being attractive and well liked by others.
OT but the line in your post BBM really rings a bell from my past with a Sociopath... In his anger I remember him sometimes ranting how he HATED that EVERYONE like me and I didn't even have to work at it! Only just remembered that from long long ago. I do thank you for reminding me of that.