Yes... I think there are some aspects of Affluenza here, but to my mind, MC is SO much more Evil than EP...
She diabolically plotted to end Conrad's life. And then relentlessly pursued that goal, day after day, night after night, in the coldest, most calculating, deceitful and driven manor.
Even when he expressed doubts, changed his mind, ( which we see he did several times, including the eve before and the morning of his death! Not to mention getting OUT of the truck!!!), she doubled down on her persistence. *If I can just eradicate those pesky doubts, He could be dead before ya know it!*
And then, when she had accomplished her goal, she put on a great show as a grieving, loving girlfriend, who said, in her own words, "I've never tried so hard to save somebody in my life!".
I loath this creature, and those of her ilk. IMO No amount of money, privilege, and/or excessively lenient parenting can turn someone into whatever the hell MC is...