The fourth season ends with chickens coming home to roost, as an alien whose people were assimilated by the Borg after the crew’s alliance with them at the top of the season is out for revenge. The Star Trek: Voyager Rewatch feels both “Hope and Fear.”
On top of that, while it’s good that the crew is confronted with those aforementioned unintended consequences, there’s no apology, no regret, no recrimination. Janeway’s alliance with the Borg was directly responsible for a genocide. Probably multiple genocides, given that it’s, y’know, the Borg. Now it’s possible Species 8472 would’ve been worse, but we really have no way of knowing. All we know for sure is that they were defending their territory from a Borg incursion into fluidic space. On the other hand, we know what the Borg does, and it’s not very nice. Some guilt on the part of our heroes would not have been untoward, is what I’m saying, and there’s none of it.