They didn't want to do this. It's obvious.
I've been watching vampire movies lately (ya know Halloween) and vampire hunting movies is a pretty easy concept. Other than just hunting in these movies but they also mention religion, social issues and gender identity all the things that Marvel has alleged they want to add to this rendition of Blade. There's no excuse they have to combat not being able to tell a Blade story. Vampire mythos stretches decades, for them to go through director after director to not even create a script tells me everything I need to know.