Nah the hord never had a chance of winning that war.
On paper it's very clear the alliance has both a technological and numerical advantage as well as far more advantageous defensive positions.
I can go into detail if you wish, comparing the alliance forces and hord forces at the start of the war, But it would be a lengthy post.
Sylvana's gamble was that she would control the major supply's of Azerite and thus have the advantage of being "the sole nuclear armed super power" but that fell apart when other major sources of Azerite cropped up and the hord could never truly control darkshore or silithus.