Treaties are entities of private law. If only one party signed while the others refuse to do it, the contract is inefficient.
Nobody made Russia sign the treaty into law. Why in the world would others ratify it when Russia has already shown they have no intention of following their own laws? Russia wants everyone else to follow the treaty while they violate it with impunity. What else should be expected from a KGB alumnus who was loyal for his entire career to the Soviet Gestapo that enslaved his fellow countrymen?