we lost Korea, Vietnam, Syria, Iraq, and now Afghanistan
Its not a stellar track record, last real war was ww2,
None of those were military losses, and other than afghanistan the initial war parts had enough in common with "real war" to be a good enough test. The insurgencies are what people remember because of how long they lasted but they weren't the only parts of the wars. Particularly Iraq, that was as real a war as ukraine is.
Korea: Stalemate forced by US troops being told to stop advancing to not provoke china.
Vietnam: Same story as above, Admittadly the vietnamese can fight though.
Syria: Not really even worth mentioning, you may as well mention libya here.
Iraq: Complete overwhelming victory followed by drawn out nation building attempt. Capital taken within weeks.
Afghanistan: Exact same as above.
Pro tip:
If your nation's capital looks like this.... you lost the war part of the war.

It's really not up to a military force to nationbuild or act as local police... There's not one country on earth that has managed to pull off nationbuilding on occupied territory other than perhaps britain with india and that was centuries ago. Maybe the mongols?
His point remains: The constant parroting that soft farm raised white boys can't win a war against those tough brownoids raised in the unforgiving environments of the third world
(which btw... in 99% of cases just means soft farm boys who didn't eat as well or learn to read) gets touted every 10 years and disproven every time. Then follows: the "battle hardened brown warriors" swap their strategy from firing AKs and cheering allah to hiding in caves, setting up roadbombs, and crying victim to make progressives cry foul.
Hell soft farm raised boys have
always been the primary warriors in war in any part of the world. The idea that any group of people experiences constant violence, even in the third world or ancient times, is logistically impossible. most soldiers don't experience a true life or death situation until their first battle because
that's just the mathematical reality of it.
The idea that you have to be raised in a shithole where your life was constant hell to be good at war has never been true.
I think it was started in Dune, but it's just the general insecurities of people who have never been in a fight thinking it's more than it is. It's much easier to toughen up somebody who has never experienced violence than it is to teach a retard to follow orders and learn tactics,
and that the numbers on his ironsights don't increase the power of the gun (yes this really happenned in africa). The former can be done with a few months of boot camp and some fistfights, the latter is a lost cause after age 12.