I'm just not convinced he's a "bad guy" yet. We don't know who he's working for or (ultimately) what they want.
The finally was fine. The only problems I had with it were/are the same problems I've had with the entire series. But the cliffhanger ending and Holder's revelation were fine. I honestly can't fathom why anyone would be upset by it. Disappointed? Okay. Let down. Fine. But upset? Whatever.
I was never all that invested in it to begin with, so maybe that's why I'm surprised by all the passionate dissent.