I knew, I know it will, but I can't

It's not that I am upset with nobody's believing me when I tell way ahead of time that those are the bad people taking great power to do bad things to the people, it's that I knew exactly those bad people doing bad things will actually happen and I absolutely can do nothing to help prevent that to happen. I am so angry with me having the ability to say 'See, I told you so.' and I don't do anything to prevent because I constantly excuse myself with 'I can't do anything'. How bad a person I am?