I am not sure. I think there are two outcomes that would end this.
1- UA holds, and can bleed the Russians. Halt the advance basically and keep hitting them in their rear areas. Infrastructure, air bases, etc. Russia can lose men, but equipment is probably more important. Many forget Lend Lease saved their ass and the West is not doing that. There are so many shells they can get from the Norks. India may buy oil (we should sanction the fuck out of them) but won't be sending equipment. In fact they have cancelled orders of Russian equipment. China? I think in the long run they would like to see a weaker Russia.
2- Putin dies..... Who replaces him is the issue. Another hardliner or a military coup hell bent on going down with Mother Russia or the Oligarchs who are getting hit in their Versace wallets.
What is in the aid package will be important. Artillery, anti-air and life support items are important. Some more Bradleys, etc. F-16's will guard Ukraine's skies, don't see them going into Russia.