Demilitarization of Ukraine and Ukraine not in NATO could have been a bargaining point but Trump gave it as a gift to Putin. Though I highly doubt Putin would have accepted anything less than that after all the lives lost.
The only bargain left is of size of land. The deal could be Donbass and Kherson east of Dnieper river given under Russian control and the region of Kursk occupied by Ukraine and Kharkhiv occupied by Russia exchanged.
Regarding the use of natural resources in Ukraine territory post war, Zelensky could get a better deal if he talked straight to Putin but there's very low chances of it.
It seems that Ukraine may become the first country in history that lost a war that will pay reparations not to the winner, but to an ally.
Lost? This has not finished yet but Ukraine still there, there is viable country called Ukraine, most of its territory intact... there is still the same government, they have an even stronger military, Sweeden Finland are now NATO, Ruzzia has lost around 800.000 people and 10.000 tanks...., a Ruzzian win you say?? Well, I hope many many more "wins" will follow this one.
Look at your own argument and you will see who is the only winner.