Did the season 3 finale jump the shark?

Yo, Zach is getting real close to Joffrey, you know what I’m saying!

1st off, I struggle with shows where a character will sacrifice humanity to save a loved one, but Zach don’t even like his father and he steals the book to save him?

Then I put up with Zach going with his mother who he watched feed on someone. But the finale in season 3 is just to far? Who the fuck does that. This kid is an idiot. Turn his ass!!!!! If I was Eff I would have shoved his face in some worms right there!

I don’t know if I can watch season 4 now. I’m way too invested and I think this show got cancelled so there’s no true ending.

Should I cut my losses at season 3?