You are right. It makes no sense that the Russians blew up an extremely expensive newly constructed "Russian Controlled" Russian money making, Russian influence Controlling carrot stick over vast parts of Europe.
There is a reason Xiden threatened to "End It" if Russia invaded Ukraine. This hits Russia's future income and influence potential Big Time.
If Russia wanted to do this as a means to justify hitting EU or Western interests. He didn't need to burn up and destroy his much needed profits and major EU influence.
He already has it and has had it. The US and every opossing EU country has been involved in facilitating the continuation of the Ukraineian war by proxy. They have not only given intelligence and guidance, monetary support and major military hardware.
Russia does not want others becoming more involved. They do not want WW3. They want Ukraine and its resources. To strengthen their future control and influence in the region and world.