There are Nazis in Ukraine, see the Azov Battalion for example. There have been several instances where western media has picked up pictures of Ukranian fighters and readers have pointed out Nazi symbols on their uniforms.
That said, I don't think even the Russians thought this war was about "De-nazification" despite that being the official line. Their focus has been on taking over the Donbas region and securing utilities for Crimea (another stated purpose of the war).
Also, it's worth pointing out that we in the west think of Nazis as primarily being anti-semitic, but Russians think of them as primarily anti-Russian, so claiming to be fighting Nazis is a good line to get popular support in Russia.
That said, I don't think even the Russians thought this war was about "De-nazification" despite that being the official line. Their focus has been on taking over the Donbas region and securing utilities for Crimea (another stated purpose of the war).
Also, it's worth pointing out that we in the west think of Nazis as primarily being anti-semitic, but Russians think of them as primarily anti-Russian, so claiming to be fighting Nazis is a good line to get popular support in Russia.