Does Russia Fear WWIII?

How does Russia relate to the potential of World War III in Europe? On the one hand has Russia actively for a long time been planning to conquer the entire Europe and this of course is why a country such as Portugal is a member of NATO. Russia plans to become a superpower once more by conquering Europe and thus hopes to become able to defend Siberia against China in the long term. On the other hand, the disastrous invasion of Ukraine including the failed Donbas offensive revealed some uncomfortable truths about the Russian military. It is incompetent, corrupt and its soldiers have low morale. Therefore, the Russian military is currently incapable of conquering Europe, and NATO could easily kick Russia out of Ukraine. Therefore as long as the Russian military remains unreformed, Russia has much to fear from a military confrontation with NATO, which it surely could not win.