For flap's sake, why be so analytical about it? Take it at face value. He's a little *beep* who didn't get slapped around with a shovel by his dad when he should have. Bad/ineffective parenting, etc.
More importantly though, he's being written in as the real villain in this story. I reckon he will become the Master (because all evil characters like to possess a young human), Eph will be at a crossroads again as he was with his ex-wife but it will be harder for him to kill Zach this time because ex-wives are easier to hate than offspring. ;)
Ultimately, Eph will capitulate and someone else will finish that little *beep* off. We'll all rejoice and thank the networks that the story has come to a (hopefully reasonable) end.
========================================
They died because ... it's in the script, now shut up.
Lol, larz. Tell us how you really feel. Wel said, however blaming Eph or Kelly for this little creep's failure is counter productive. Kelly was a needy narcissist, and Eph was busy saving the world and has now turned to the bottle for help. All this notwithstanding they loved Zach, nurtured him, and protected him. They did the best they could as parents. Zach is to blame for Zach, he's just a bad seed --not Kelly or Eph's fault. Gus had it bad, with his upbringing yet he loved his parent and appreciated what he could. Some kids are just bad.
shareMaybe Zach was helped a bit in his transformation when the Master healed him. The serum not only healing his asthma, but unlocking his need to get his way. But I can accept that Zach is a sociopath.
And what fresh Hell is this?, Malory from Archer(Dorothy Parker)