Bioware decided however to go a incorrect route and make it seem as both sides fought to a stalemate, its pretty clear by their own lore this was no where near the case.
This is actually incorrect, and ties in directly with the Sith Warrior and Jedi Knight storyline. The Sith Emperor declared a "peace" between them after the sacking of Corusant and a cease-fire. The Sith Empire was working in his own interest as he didn't want the Empire to finish the war yet, because he needed more time to be able to devour the essence of the galaxy itself and preserve his immortality, and he needed the powers of the Empire and Republic to stalemate. The Republic survived because the Sith Emperor allowed it.