According to the most recent ExtremeScan poll, support for the war fell 13% in one year — from 64% in March and April 2022 to 51% in April 2023. That is significant, but it’s clearly not enough to make the Putin regime tremble.
There is some greater light cast by other surveys, however. Russian Field found that only 27% of Russians support further military escalation while 34% want peace talks. Slightly confusingly, 33% favor both options at the same time. The trends are clear enough — backing for the war is on a slowly declining path and the issue is extremely divisive. More importantly, the reasons and justifications people use to make sense of the war have shifted.
Did you even read the article you posted?