Star Trek: What Are The Origins of the Borg?

gamerant.com:

Wild and wonderful creations have stemmed from the Star Trek franchise over the years, from the plethora of real world influencing technology, to a rich and diverse socio-political infrastructure. However, some of the most interesting aspects of this world's stories are the villains. These are often not the run-of-the-mill villains; rather, they are rich and complex cultures or beings that have relatable backstories, fromthe memorable Khan to Dul Dukat. They are not just evil, but rather warped and transformed through years of pain or necessity. The Klingons, the villains of the Original Series, are prime examples of this. They began as wild, animal-like antagonists, only to later join the Federation and become not just understandable and relatable, but creating one of the most beloved characters in the entire franchise: Worf. One of the biggest villains however, the Borg, is shrouded in a thick veil of mystery, their origins never fully explored.

This enigma of where they came from makes them all the more scary. Up until the questionable introduction of the powerful Borg queen in Star Trek: First Contact, they appeared to be akin to a computer virus. They were not necessarily good or bad; they just followed the most logical route to achieve perfection, without fully understanding the consequences of their actions. The queen and her distinctiveness skewed this slightly, giving them a much more nefarious persona. Regardless of whether this was a good choice or not, they still never, despite the film featuring them as the main antagonists, fully fleshed out their origin story.

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Not only does the film not do this, but there is very little information to be found within canon.