Wanting to lose is silly and simply an unrealistic expectation for this story. The garleans are destined to lose, we know this. however a good antagonist has to actually be shown as a threat before beating them to get a more stratifying end, the lore has stated numerous times that the garleans are near unprecedented in the field of war due to their airships yet we hardly see those airships do anything significant, sure they show us ruins from past battles but never in scenario.

Take the juggernauts getting knocked out of the sky, sure it might be a visual spectacle to see a powerful warrior knock one out of the sky however we've never actually seen how capable those machina are and so far it just seems like they aren't even good for what they're supposed to be for. A scene like that would have more impact if we actually witnessed what those ships are capable of.