Ukraine has been nuked? Or perhaps that’s read as “used” as a threat. In any case, the point was that the previous agreements did not provide any defense guarantees.

And what is article 4 in relation to the UN security council? There have been several security council meetings on Ukraine.

They promised to not attack them, not to defend them. https://en.wikipedia.org/wiki/Budapest_Memorandum

Clearly Russia broke that agreement, but the US, UK, France, and China haven’t.