Ask Singaporeans, Indonesians, Malaysians, Vietnam, Thailand... The only regions where the sentiment of "Russia will fail and relinquish all captured territory" holds is in Europe and North America.
Yah, Vietnam would never expect that a foreign invader would try to invade a country, fail, and then leave entirely. When would they have ever witnessed that happen?
We can't change horses mid-stream which is why Zelensky will not hold elections. But ousting the military chief of Ukranian Armed forces? Of course that would happen.