I'll admit that as a fan of awful movies, this one had me completely stumped.
The best bad movies I find are the ones where a serious effort has been made, but due to budget constraints, an amateur director, and poor actors falls flat on its face. Or, a big budget movie with A list actors and bucket loads of money thrown at it that somehow turns into an embarrassing failure.
I couldn't quite get my head around this one. S vs W had a fair sprinkling of decent actors who all came across as overacting amateurs, the make up/prosthetics were laughable, the dialogue felt as though the actors were just winging it without a script, the editing was all over the place.
Overall, Strippers vs Vampires was a complete train wreck. No too ways about it.
The main nail in the coffin, or silver bullet in the heart for me is that the producers have actually aimed for a Sharknado and when you're actually aiming for a 'so bad it's good' movie you need to be absolutely spot on. Good bad movies usually just happen. There's no effort and no formula. The magic just happens unintentionally.
In the case of S vs V all you have is just simply a bad movie. End of.