When those random countries lose, especially NATO ones, the one that benefits isn't US however. US always had access to whatever they want from them.
What's going to happen is that Trump will halt the value chain climbing for many third world countries. By doing so, he creates the self fulfilling prophecy USA fears the most, that China will tie all global south (and small NATO) nations into an empire-colony type relationship and no one will ever get out of Chinese dependence.
The likes of Vietnam or India or even EU are relying on US' market as an alternative to China, Trump is right that they "exploit" US in the sense that they use US' fears about China to upsell uncompetitive products. With US market gone, a country like Vietnam can no longer develop up the value chain. This means there won't be any alternate suppliers for US, instead most countries will be deindustrialized and get their revenue from selling raw resources to China.
China is on per person level 10-100x more productive than nearly all other countries, especially third world countries with inconsistent logistics and weak energy supply. So if tariffs apply (nearly) equally globally, countries will instead just move all the difficult (and high value adding) steps to China.
Again, it is utter stupidity because as even Biden realizes, US needs the whole world to have a chance at take on China. Weakening the world, even if it can grant some short term concessions to US from a few countries, is extremely not worth it if it destroys the only chances US has to make a non-China dependent supply chain.
There is no monetary concession big enough to compensate for losing the cold war. You can beat and shock your own henchmen all you want, make them sign over all their savings and humiliate themselves for you, it's not going to help you when the rival cartel soldiers are already outside your door and about to turn your face into a persian rug. At this moment, US should be giving their "allies" concessions to prepare them for the coming storm.
There are two things which are priceless in geopolitics, that is loyalty and industry. Loyalty is that you have people willing to compete for you. Industry is so that you can actually give those people the tools they need to compete competently. Biden understood this. Trump doesn't, and that's why even US nationalists feel instinctive unease about his moves.
