The Borg Queen seemed petty, and way too catty.
Yeah that was the core problem - trying to sex her up and make it seem like she was chasing Data and then Seven.
Janeway and BQ were having a big ole lesbian catfight over Seven before long. Poor Borg! They got treated with zero respect.
I guess it's possible that the BQ was petty because she was spoiled, but who wants to see a show about a spoiled brat cyborg? It just drags the whole species down.
Plus, let's face it, the lesbian catfight was about ratings, not about any sort of logical approach for the Borg. The whole thing was sleazy and tacky.
Then the Borg Queen was brought in, and now you had someone to trick and dance your way out of the mess.
Yep - the BQ was a liability for the Borg, so why did they bother with any queen much less a sleazy slutty bisexual spoiled brat princess for a queen? The only possible answer is: ratings.