It was janeways fault that she didn't trust Tuvok.
Tuvok made a lovely bomb for Kathryn in Omega Directive.
The first was too small, so he cranked up the yield per his Captain, his Captains wishes.
It also seems like she may have trusted the timer on that bomb.
And then there was the superior ordinance Janeway used to blow up that Cube in Dark Frontier when she was stealing coils off the Borg like a common hood.