There is (perhaps) a deep irony in the fact that The West has been deregulating and undermining all the post WW2 international institutions (not just the UN) because it was the driving force in creating them, and it has blatantly used UN resolutions to give it cover for armed interventions up to now.
Arguably now the West needs the UN it find itself unable or unwilling to use the UN as a driving force for action and more vigorous opposition to a straightforward war of aggression which is clearly illegal (there are 4 internationally recognised crimes; against humanity, war crimes, genocide and war of aggression).