I don't think he's wrong America will pull back, I think he's hilariously wrong thinking it will pull back to near total isolationism and become a blatantly imperial power towards south America again and that he's dead wrong on the timescale. Also, his analysis of nations and their interests is good but his future predictions are hilariously dumb. Germany, China, Russia etc "ceasing to exist" is little more than an American nationalists fever dream.
Yeah, there's some things that are likely to push America back, but that is very different than America just "pulling out". Afghanistan might be a good example there: America didn't really "pull out" of Afghanistan. Practically, it was pushed out. The big picture difference on that is that America being pushed out of Afghanistan didn't produce a meaningful power vacuum. You might have had a little vacuum during the actual pull out, but because the US was leaving due to pressure, that vacuum was near immediately filled by the Taliban, and I get the impression the Taliban's control now is stronger than it was when we initially went in in 2001.
Likewise, the US may lose some influence in Africa, but that seems likely to generally be from the US losing a power game with Russia and China, rather than just abandoning something to chaos. Or local powers gaining authority. US authority in Russia in the 2010s was likely lower than it was in 1995, not because the US "pulled back" out of some principle, but because Russia pulled itself together and reasserted its authority. Iran, Turkey, and India seem like other areas where the US might be partially in retreat, but once again its not the US pulling back on some principle, but the locals building strength and capabilities.
The US in general doesn't seem particularly inclined to pull out of anywhere the occupation is "successful". The pull outs that have happened seem to have generally been driven by successful local resistance, not American desires/concerns. They're done in spite of what the US wants, not in accordance with it.
Now, the obvious counter example is Libya, but then again that is a US attempt at intervention gone wrong, not the result of the US pulling out. The US's appetite for intervention is also gone down, but that also seems much more driven by American failure. America did commit to trying to win and shape Afghanistan for 20 years. After 2 decades of failure, and I think its not really up for debate the US is in a relatively weaker, more fragile position than it was in 2001.
As much as we dunk on Russia, Russia now is still probably in a stronger position than it was in 2001, when its military was barely capable of fighting in Chechnya. Ands its economy is 3-5x larger now than it was in 2001, and the gap between the US and Russia closed from roughly 30-1 GDP advantage to 10-1.