Depends on Russia's goals. From this other front page (lengthy) discussion[1], they posit Russia likely made a mistake if their goal is regime change. Insurgency's work, especially when they are legitimate. I expect if Ukraine forces survive, they would recieve long-term and well-financed backing indefinitely from the west. Now if Russia's goals are not regime change but just to destablize / make a mess, or even to just make a statement and leave (if that's politically viable? idk), different story.
I personally don't expect Russia to conquer all of Ukraine. It's a big country with 40 million people iirc.
When Germany invaded Ukraine in 1941 they had 3 million soldiers.
I honestly don't know what Putin is expecting to gain from this. The occupation won't pay for itself and Russian economy is already bleak.
[1]: https://acoup.blog/2022/02/25/miscellanea-understanding-the-...