Yes, the US did not get this right. At all.
Russia could have been Germany-fied with a friendlier and supportive hand. Instead it was handed over to evangelical neoliberals, whose imposed economics guaranteed that only the most feral opportunists and violent gangsters would thrive.
Russia could have become a modern social democracy, but now it's a crumbling militaristic dictatorship state run by a raging senile paranoiac with delusions of empire.
It's one of the worst foreign policy failures in all of history.
Ukraine will not be the end of it. If the invasion succeeds Russia will demand a slice of Lithuania to reunite Kalingrad with Belarus. That has huge implications for all Baltic-adjacent states.
But worse, Putin has claimed the RF has a number of nuclear superweapons, including a strategic nuclear-tipped torpedo and smart hypersonic warhead delivery systems. He also completely renovated Moscow's civil defences.
The US has failed to keep pace, and its weapons systems are either old and outdated or over-designed, high maintenance, and relatively fragile.
Putin also been running a very successful program of subversion and political interference. And building up cyberwarfare capabilities.
Even allowing for hyperbole the worry is that Russia is capable of a zero-warning decapitation strike, combined with remote mass infrastructure attacks and internal terrorism. Any response would be relatively ineffective.
This completely undermines MAD as a doctrine.
No mistake - the US is in very, very serious danger now, from both internal and external threats.