Why didn't i enjoy this?

Rating: 3/10 (26 March 2017)

I don't understand why i disliked this movie. I love tom hardy, i liked the originals, i like no-brain movies such as independence day, starship troopers and highlander. And yet i just didn't enjoy this at all.
Were there too many questions? I guess the characters didn't engage me. There was no set up to max, he just got nailed by the white guys at the start. Why was he then trussed up to feed them blood? What was the purpose of this? The white guy didn't seem to miss the blood later on. What was the deal with the skull face guy and how did he have all these attractive females? Why did charlize theron decide to go rebel? And why should we care?