I just heard the fan theory that the Borg are “farming” the Federation. Essentially attacking the Federation in ways they know will just barely fail in order to provoke the Federation to keep coming up with new tech that the Borg can still steal from single vessels. The Borg could beat the Federation if they deployed in full force but this way, they get all the technology that the Federation comes up with to fight them. This might be a standard Borg tactic. They just ping creative species until the advancements are tapped out and then they go full force assimilation.
And, having heard that, I think I like that better than a large chunk of stuff that has been done with the Borg in cannon at this point. That I find interesting.
