They would KILL him or threaten another revolution if he had agreed to enforced the Minsk Agreement or didn't agree to continue the civil war on Donbas.
Yes, they have that much power and they are bankrolled by oligarchs.
https://www.vox.com/2015/3/23/8279397/kolomoisky-oligarch-ukraine-militia
Kolomoisky funds and directs a large private militia that has been helping the Kiev government fight against the pro-Russian separatists in eastern Ukraine. Militias like his — and there are dozens of them — are a source of deep concern to analysts who believe they could threaten Ukraine's long-term stability.
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Kolomoisky, an oligarch who is also the governor of Ukraine's Dnipropetrovsk region, is a significant backer of the pro-Kiev private militias fighting in the country's east. He funds the Dnipro Battalion, a private army that, according to the Wall Street Journal, has 2,000 battle-ready fighters and another 20,000 in reserve. Newsweek reported that Kolomoisky has funded other militia groups, as well.
The conflict has empowered pro-Ukraine militias like Kolomoisky's because the Ukrainian military was too weak to fight the separatist insurgency on its own. When Russia annexed Crimea in early 2014, Ukraine had only about 6,000 combat-ready troops. The paramilitary "volunteers" bolstered the fighting forces, funded in part by private donations from wealthy oligarchs. Bands of politically motivated thugs, dating back to before the conflict, grew into more substantial militarized battalions. There are now an estimated 30 "volunteer" militias fighting the separatists in eastern Ukraine.
So... you totally didn’t answer my question. I asked you what neo-Nazis had control over Zelenskyy. You told me what a Ukrainian-born Israeli Jew would do with his private militias if Zelenskyy didn’t....?
Last I checked, except for in the fever swamps of former KGB agents, Jews and Nazis had pretty dissimilar goals.