> she also saw messed up stuff in military
Yes, like her supervisor being absolutely willing to go along with faking information against innocent Iraqis that got them jailed and killed.
> damaging, criminal decision to turn all of that over to Wikileaks rather than pure whistleblowing
Ummm, her commanders refused to listen to pure whistleblowing. Didn't you read about the case?
As someone required to report a crime, you aren't required to put in a show of effort and declare it done, you're required to do your best to stop it.
> Manning left the ethical decisions to that third party.
No, Manning made the ethical decision knowing what Wikileaks promised - to get the information seen. And she made the right one.