I figured it would be a bit spooky being in the same vein as Jeckyll and Hyde with supernatural horror being the foundation of the plot.

I agree, Henry's philosophy is certainly misogynistic and bitter, but I think that is what Wilde wanted. Dorian's decent begins and is fueled by his relationship with Henry.

The qualities of Henry's character suck. But the part his character plays in the novel drives Dorian's character development.