It's only one reason, but to quote a friend: "Voyager turned Picard's White Whale into Flipper." Totally absurd that ONE Borg cube annihilated virtually all of Star Fleet at Wolf 359, and brushed off USS Defiant (which was DESIGNED from the keel up to fight the Borg!) without a second thought, yet Voyager takes on the ENTIRE Borg race and wins?