Could be completely anecdotal, but browsing the Wikipedia day-by-day timeline of the war I've noticed an increase of "SBU arrested Ukrainians was arrested for treason/corruption" events, which seems like a really dire indicator.
I wonder if Zelensky will get thrown under the bus or if he'll manage to find a scapegoat who "stole trillions" who will conveniently die or disappear and be unable to defend himself.