Well, there are channels with intercepted phonecalls indicating what seems to be widespread unhappiness with the Russian military, the war, and the government.
The idea of a “preference cascade” is that when opposition comes out in public, and is seen to succeed, all this private, personal conviction comes out in the open. Then things can change fast.
I saw this happen, before my eyes, in 1983. A funeral procession suddenly turned into millions of people in the streets.
You seem to be a somewhat thoughtful person so I don’t see why you would have a problem with me.