The only cure for Russian military failure is tackling corruption. No Russian empire has ever done that. Not Tsarist, not Soviet, not post-Soviet. Learning requires admitting error and taking responsibility. The Russian military is built on a ponzi-like pyramid of lies sent by its serf mobiki from the field up the chain of command. So you can safely vote for "or not".
Ukraine will take a page out of the Israeli and Finnish playbooks: large reserves of trained civilians plus homegrown military technology industry.