There is no one to blame but Putin.

This is an emergency procedure due to Russia's invasion in Ukraine. Without the invasion, the backup coal plants would just stay backup. As coal plants need weeks to start up, they cannot just be turned on when needed. They need to be turned on early and likely run with low power through the winter, just in case they might be needed. This is bad too. This is due to Putin's war.

It's silly to make connections to the 1986 & 2011 nuclear exit, when the cause for this short-term measure is a recent event. Without Russia invading Ukraine, the coal plants would stay off.