Someone has to first try to end it before we know whether or not anyone has any idea how to end
Not fair to argue that no one has tried to end this thing (besides the Russians, who you've mentioned).
China came out with a proposal, which was not entirely one-sided in favoring the Russians. In fact, it was a pretty good deal for the Ukrainians - had they been given permission by Blinken and others to negotiate it in good faith. As it were, the United States pretty transparently torpedoed the Chinese initiative. At least the Chinese managed to sit the Saudis and Iranians down for talks, because that was another huge cash cow for the American MIC that they were not willing to lose.
After the Chinese attempt, came the turn of the Africans. These fellas were just treated with outright racism. The Poles had some fun with their security staff, Zelensky organized a fake air raid, then his deputy said Africa has "no understanding of the conflict and should abstain from providing advice". Mind you - these people that "don't understand the conflict" are the ones suffering from critical hits to their food supply chain, and are facing famine.
Finally, there is of course the Potato Fuhrer himself. Lukashenko has offered his mediation in the conflict since the very beginning. The laurels of a peacemaker really appeal to his soul.
There's also the 80% or so of the Russian entertainment industry which has been calling for an end to the war (lots of Ukrainians amongst our pop stars and actors). Now a lot of them are sitting in places like Tel Aviv and Istanbul. People are not taking their appeals very seriously, since these guys clearly just want to go back to touring both countries and making as much money as possible.