United Nations: Is it Effective?

A week ago the UN Security Council attempt to sanction Syria's current regime under President Bashar al Assad failed as a result of Russia and China's veto. This was a direct attempt to end the violent ongoing conflict between the anti government faction within Syria against the Syrian Military which resulted in the lost of hundreds of lives in a conflict which has lasted for nearly 11 months. The UN Security council in this case the US, Great Britain, France backed up a plan proposed by members of the Arab League asking pressident Assad to step down from the presidency or face harsher sanctions to its regime. However this proposal was diliberately vetoed by both China and Russia where many countries viewed as an outrage and unjust. This is an example and indication of the lack of UN effeciency to promote order and stability to its member states. The world cannot turn a blind eye in conditions where a state attacks its own people and deny's their people the basic necesseties of freedom. One could wonder where is the humanity behind all of this and the role the UN has in promoting universal values of human rights to its member states ratified by several countries upon entering the UN. Is this a indication of the failure of the UN ideal? It leads me to wonder where does the UN fault lies in this fiasco?
If we were to talk about the system itself we could see several critical flaws where in this case the UN Security Council itself calls all the shots concerning whether a resolution passes or not and these decission itself is monopolized by major powers such as the US, Great Britain, France, Russia and China. Ultimately this leads to the "monopoly" of UN resolotions despite majority vote. I beleive that all countries should have an equal representations in the coucil and decisions should be based on majority vote! Many conflicts in the past escalated because of a result of the UN inefficiency to uphold the basic mission of the UN  itself (Peacekeeping, humanitarian assistance and social economic development) the world have witnessed the tragedies of the former yugoslavian republic and the genocide in Rwanda will the UN continue its past failures due to the lack of inneficiency to take actions? and will history repeat itselves?
The UN itself is established by the basic ideals of Universal norms of its member states which respect the rights of states and individuals within its jurisdiction. It hopes to create an institution which promotes trade, mutual development and equal prosperity to its member states. However the fault of its implementation lies in the area of legitamacy itself whereas the UN cannot directly interfere with its members domestic policy. This has led many countries in the past to take Unilateral actions against other states mostly in the basis of individual state interest without any single authority keeping them in check. Will a Universal government be the solution of the UN's inefctiveness? but under who's mandate will it fuction? During my time reading about this particullar international government there is still no acceptable solution to deal with these inneficencies however the most simple solution in the short term would be to abolish the UN security Council and turn it into a majority vote. But in the long run the notion of Universal Government should be a plausible idea..