Capitulation would entail no sanctions, let alone unprecedented, economy wrecking sanctions, no cooperation from American companies shutting down their businesses with and inside of Russia, no replenishment of weapons and financial support for Ukraine and no NATO solidarity.
That's what we know about. How much American intelligence and targeting info is contributing to Russian losses we don't yet know.
Add the unknown to the known and it adds up to anything but capitulation.
Hyperbolize, misrepresent and misattribute cowardice to others to your heart's content, but a few more Soviet era jets added to the mix wouldn't count for jack.
The real cowardice is among republicans way too late to the condemnation of Putin that their erstwhile treason weasel fake president was also loathe to give.