Yes, but victory has to be understood through the eyes of both sides. For Putin and Russia, they want control of the Ukrainian "territory". Russia was defeated in the 3 day takeover attempt. They switched from trying to take Kyiv to holding the coastal ports, which are vital for Ukraine's economy. This lets Russia to go the long rout and crush Ukraine's economy, and this can go on for years if Russia wants. It gives Russia a foothold for another attempt at Kyiv when Russia has built its military back up. This has been said over and over. Putin will take that if that's all he can get.
Ukraine has to get Russia out of the country. Ukraine loses if they don't. Russia is having enormous problems with materiel and reinforcements. They're running out of artillery shells. Cosplay soldiers aren't soldiers. Soldiers with no training other than shooting 30 bullets at a target are just meat in a trench. What you're seeing now is Ukraine having to go at the pace it has to in order to provide cover for their troops because of not having air superiority. But they're still doing it. They've just crossed the 2nd Surovikin line. They're flanking Bakhmut. They're establishing multiple beachheads in the south along the river. They're dismantling Crimean air defences and taking out whatever high value targets they want there, and forcing the Russian navy to move or begin to move. They're taking out Russian command and control. They've been hitting Russian ammo depots. They've snuffed entire units. And they've been destroying Russian tanks and artillery to the point that they're running out of those as well and aren't able to keep up the fight like they did earlier this year. Cosplay soldiers don't make an army and barrier troops don't make people believe in fighting or that they've eaten something when they haven't. Start conscripting people from Moscow or St Petersburg instead of the poor country folk and see how it goes. Ukraine wins by grinding Russia down to the point that they can't stay, whether that's because a place like Crimea is too hard to keep or the people in Russia don't want any part of the war any longer.
Actually there's an
interesting youtube video out recently on this very subject.
Ukraine's Alternate Win Condition: Inside the Gamble on the War of Attrition