I think Ze had a change when he first on words agreed with the Russian demands on the first day and some opportunity remained until the second day of Istanbul talks.
Now, Ukraine is most likely finished no matter how hard the media tries to prove otherwise.
As I’ve said prior - Ukraine will never be it’s own master or be in control of their country. Too many Int. Leaders have their pockets filled via Ukraines corruption and they will make certain that revenue flow and where they have invested continues to fill their pockets. Ukraine will get the leftovers - maybe- from time to time but the bulk of revenue never reaches the publics interests.
Rather like in other countries where the revenue flows one way or another - Haiti comes to mind with all their Charity foundations which are really washing machines...and their corrupt governance.