What factor makes the UN less effective in settling disputes?

One key factor that makes the UN less effective in settling disputes is the veto power held by the five permanent members of the Security Council (the US, UK, France, Russia, and China). This allows any of these nations to block resolutions, even if there is widespread support from other member states, leading to stalemates and inaction. Additionally, the UN often lacks the necessary enforcement mechanisms to implement its decisions, relying on member states' cooperation, which can be inconsistent.