It's just how voting works I guess. She is gonna lose 1vs1 against everyone, but have Kirk, Picard and Sisko fight for votes and the few dedicated Janeway crazies can be enough to make her win.
I don't know. Startrek.com had a poll about best role model captain awhile back and Janeway won with like almost 60% of the vote with the next highest only having 25% and was Picard. I think something's infected the trek continuum