My thoughts are you're historically ignorant. Since the USSR years Russia didn't trust UN and other international organizations. Whether the mistrust is justified or not I don't know but the definitely don't trust them.
Dude, the Russians/Soviets basically invented (with the French) manipulating UN votes as proxies for establishing normal international policy, let alone actual action regarding it. Aside from a brief period during the Eisenhower administration, it comparatively took decades for the U.S. to realize they were the only ones "playing by the rules" even including their typically free vote from Taiwan and overtrust in the UK. The Soviets were never vetoing out of mistrust, they were vetoing out of stopping losing votes. (As the US/China/Russia now does.)
Even just on the security council, the Soviets issued nearly every internationally focused veto from the permanent five until the 1970s. The U.S. and should-be proxy vote Taiwan combined issued a total of one prior to 1970. Taiwan vetoed Mongolia joining, that the Soviets immediately responded to by announcing a permanent veto on any further African states until Mongolia was allowed and Taiwan reversed. The UK and France mostly vetoed in cases regarding the unwinding of their colonial positions.
The ascension of China to the fifth seat, along with the overall global governance changes with colonialism ending, was the start of a period that mandated a change in the calculus of the Security Council's positions, the Soviets (who until 1970 issued 80 vetoes, more than any country has
ever issued until the next U.S. veto ties the U.S. all-time with the Soviets 1946-69 record) were no longer permanently the outlier nation on the Council, the U.S. entered that period as it more often and thus dropped 65 vetoes until 1991. (The UK, and occasionally France, backed up this switch with a combined 40 vetoes in this period versus 10 from the Soviets.)
The Soviets, and then RED CHINA, have always been the dominant power players in the UN because they were better at managing the votes in the SC and General Assembly. (Something I've always found amusing considering the respective at home governments of the various parties.) Many of the various diversity and rotation rules, along with things like picking the Secretary General were almost always the Soviets not giving a shit other than to poke the Western allies in the eye and win support from the Southern Hemisphere and using their mandated position as leveraging this.
