" Wouldn't that make you depsise the dark side that much more? If accepting the dark side of the force allowed his anger to swell so much that he killed the love of his life, why would he continue down that path? Did the dark side cloud his mind that much that he didn't realize what he was doing?"

Agreed, but consider this: At that point, the Dark Side was all he had left. If he didn't stay with Palpatine, who is now controlling the galaxy, where is he to go? He's lost all of his family and friends.

Still, Anakin's turn is weak in ROTS.