https://www.heritage.org/defense/commentary/yes-the-us-military-weak

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For nearly 20 years following 9/11, the U.S. military conducted operations that consumed platforms, munitions, and equipment purchased to fight the Soviet Union. Sadly, these assets have not been replaced at similar rates. As a result, the military is stuck with aged platforms and diminished inventories.

America’s support to Ukraine has exacerbated the problem, as the Pentagon digs deep into existing inventories of weapons and munitions to help Ukraine defend itself against Russia. Inventories are nearing war-reserve levels, and it will take years to replenish them.

Though some new equipment is slowly being fielded, the force continues to shrink. A military barely able to handle one war is ill-equipped to do more. Should the U.S. be called to defend NATO partners in Europe, it will not be able to support Israel, Taiwan, Japan, South Korea, or anyone else, anywhere else.

Far from deterring competitors, this situation will embolden them, increasing risk at the worst possible time.

In its current state, how can our military be assessed as anything other than weak?

</quotes>

And that's not the only analysis which judges America's military to be weak, it's also analysis which isn't partisan.

It may have surprised Putin that America was prepared to weaken herself in her defence of Ukraine but, on the other hand, he knows that by doing so America weakens herself further.

China's Xi has almost certainly made the same observation. Both will be happy to see America burn herself out.