I'd argue these things build on each other. Nobody should expect people who have been indoctrinated all their live to completely change their views at the first revelation that things aren't working as they were told. But seeing more and more evidence of the depravity of the oligarchs at the same time as their own standard of living continues to erode is forcing people to start questioning things.

The key part here is the material decline affecting people's lived experience. Back when the economy was more or less functional, people would read about stuff like Panama papers and shrug. It didn't affect them personally, there was nothing they could do about it, and they had their own immediate problems to focus on. Now, people are barely making ends meet, jobs are scarce, the cost of living is going up. And these are things people are now experiencing in their daily lives, and seeing the sheer depravity of the elites who rule over them is starting to push people over the edge.