Yes, US should focus on internal issues, and UN should be elevated to deal with global issues. Make the UNSC works and US will not need to become the world policeman. The UN Security Council was made for that purpose. Reform the UN and give her teeth.
At least with the UN - there is legitimacy - that the US or any other power lacks.
If we need a global standing army - let each country contribute 1000 troops - and that will instantly be 180,000 troops - let them be trained on international intervention.
So if we go to Afgan as a world force - with each country - sending 500 troops - they will listen. Or at least 100 countries backed by UN - and all agreeing to sanctions and make Afgan a pariah state...or whatever the UNSC resolution would be.
But somehow the US-appointed themselves to be the World Policeman and they have completely failed everywhere they have gone.
How long can you protect people from themselves, at what cost of life and resources? Biden or even Trump was right in this case, get the hell out of the place and let the chips fall. The so called army with NATO training and resources disappeared or joined the Tali to share the spoils. The USA needs to start taking care of its people, these foreign adventures is what gave us four years of hell with Trump. There is a huge disaffected population of white who feel left out. I just came back from Seattle and Portland, the level of homelessness there in mind boggling.