What should happen is that only countries that subscribe to the jurisdiction of the International Criminal Court to investigate Crimes against Humanity and War Crimes should be allowed into the Security Council as the 15 -members, which will mean the removal of those countries permanently that do not wish their actions in the global sphere to be judged to this criteria as unfit to head the government of the world which the United Nations represents. Thus countries who do not accept the jurisdiction of the International Criminal Court will permanently have the status of being able to voice their views on global issues in the General Assembly only. Otherwise they will commit war crimes and crimes against humanity with impunity.
But who is going to bring about such reforms in the present status quo while the Security Council has 5 permanent members. With the Iraq and Ukraine examples, of the past 20 years and fomenting geopolitics continuing the world is getting polarised not unified under the United Nations. The system is corrupt on account of the source of funding for the United Nations which consequently determines policies of its various institutions.
Is there any use for the United Nations unless there is an agreed world order. The answer is there is a role for the United Nations and a role for the Security Council for any change must be peaceful as we cannot get away from the fact that the world is currently divided into democratic and authoritarian regimes who need to talk with each other to come to solutions such as on climate change, human rights, refugees, Agricultural and Food Security across the globe.
So we are stuck with the system in place. The International Criminal Court has done exactly the right thing in issuing summons on the Russian president Vladimir Putin for his country's war crimes and crimes against humanity in Ukraine so that at the very least he will only be able to travel to countries that support his alleged crimes or he will be arrested. These proceedings must go on indefinitely and must be extended to senior commanders of the army that invaded Ukraine and those who launched cruise missiles from within Russia at those targets. That is the only way the authoritarian regimes will be forced by their own citizens to change to greater democracy and respect for human rights.