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The OUN, UPA and the SS Galicia are practically worshipped by the Banderites in Ukraine and the Kiev regime has declared the OUN and other Nazi collaborationist fascist organizations as Ukraine's national heroes, built monuments for them and renamed streets after them.

The British and Americans smuggled OUN/UPA and Ukrainian SS members to the US and Canada after WWII and those Nazi collaborationists and their descendants formed the Ukrainian diaspora organizations that pushed the Holodomor myth, spread anti-Soviet and anti-communist propaganda and were behind pushing revisionist history in the 90s in Ukraine, and especially after the 2004 color revolution.

Many members of these groups returned to Ukraine after the USSR dissolved and eventually wormed their way into power. Some of the current Kiev elites are direct descendants of OUN/UPA members, and many others at some point associated with those Nazi collaborationist Ukrainian diasporas in Canada and the US.

So yes, the current fascist regime in Kiev are the direct ideological and sometimes actual descendants of the WWII Nazi collaborationists. The rest of the Kiev elite who aren't ideological Nazis are mostly former criminals who were part of various mafias and organized crime in 90s and 2000s who have useful criminal connections.

Some articles you can read:

Partnering with neo-Nazis in Ukraine: an inconvenient history

Ukrainian government spends millions on monuments and streets to honor Nazi collaborators and neofascists

How Nazi Collaborators Are Celebrated in Wartime Ukraine

The roots of fascism in Ukraine: From Nazi collaboration to Maidan

Neo-Nazis and the Far Right Are On the March in Ukraine

And it's also worth reading from this longer piece explaining the background of the SMO, the chapter entitled "Ideology of Nationalism in the Service of the Kiev Regime in Modern Ukraine"