Don't expect that this will end up being as nice and comfy as bombing other 3rd world countries, which is the only military expertise that NATO had had for decades.
A few hypersonic Kinzhals with tactical nuclear warheads would surely be a refreshing response to NATO's typical "hit-and-run" tactics.
That would leave Putin with no power. So no, that is not going to happen.
As for how competent Russia is, we have seen that. They are not.
Says who?
Just as you don't expect an immediate all out nuclear armageddon as a response to your attempts to "bomb shit out of Russia", there won't be an "armageddon" response when Russia retaliates wiping a few crucial military installations from with the face of the Earth.
Nah, going all out with a civilisation-ending scenario would be the last resort, when everything is lost, and every other possible and dislikable option had been exhausted.
Up until then it will be a nice long and bloody escalation. Tactical nukes, chemical and bio-weapons provocations, assassinations, terrorist attacks, mass mobilisation and conscription -- all the fun stuff akin to what had been done to the Arab world, but on a much grander scale and incomparably higher stakes.
I'd doubt even the US would able to sit this one out. Can't imagine their shock from an actual real war, given what kind of tragedies were mere child's play things like 9/11 or Pearl Harbor.
Except of course Ukrainians are paying for it with their lives, sacrificing themselves for the safety of the rest of the world.
You meant that they are conscripted/mobilized and sent for slaughter for the safety of establishment's political interests?
Russia can't defeat Ukraine with Nato weapons. Once the gloves are of they can either take the deal with the international coalition now and get all the money for no work, or become even more of a joke and take the deal later anyway.
No nukes need fly, because we are not an existential threat and Russia cannot do much in a conventional war.