I'm coming to this discussion really late, but holy shit that last season was bad.
The whole Gangs of Hemlock Grove plot was terribly out of place.
Shelly's adventures in homelessness thing was painfully embarrassing. I like Shelly, but I think the show would have been better if she'd succeeded when she tried to hang herself.
Why the hell didn't anyone kill Olivia? She was vulnerable many times, and everyone hated her and knew she was dangerous.
Annie was awful.
I'm sure I'm putting way more thought into this than it deserves, but what was Spivak's plan? He spent years and years manipulating the upirs to make Nadia, and then he bred with her. But why? Wouldn't the point of that be hybrid offspring that are immune to upir venom? But the little baby manta rays weren't immune. So... ?
And somehow there's a tunnel under the cabin in Erie, Pa that leads to Niagara Falls? That's a four hour drive, at least.
Ugh. This show.