The only way for Ukraine to win this war is to destroy Russia’s ability to wage it.
The Ukrainian economy is utterly exhausted. Its operating entirely on the credit from its western allies (who are - incidentally - keen on carving up and selling off what’s left of Ukraine once the war is over). At best, Zelensky can stop the bleeding of territory to Russian creep. But unless they want to fight this war for the next 20 years (a la Vietnam / Afghanistan / Iraq) they’re not going to end a country 10x their size. Certainly not when the MIC they’re relying on demands giant profit margins for every rocket launched and bullet fired.
Destroying the invader demonstrably brings Ukraine closer to ending Putin’s invasion.
Not when Ukraine is cannibalizing itself in the effort.