This is all of Halo vs all of Destiny. Even if we assume you're correct (and that's a big assumption) and Guardians>Spartans than congrats, the entirety of humanity's military in Destiny can beat 1% of humanity's military in Halo. That's before you take into account the rest of the UNCS military, who alone outnumber the entire Last City by a several billion to one ratio. Then of course you have the Covenant, the Forerunners, the Precursors, and the vast technological and numerical superiority these races have over everything in Destiny.