I've been to Russia many times going back to the USSR and can say with certainty that Russia is not a world class anything except when it comes to nuclear weapons. There economy is a joke. Their per capita GDP is under $30,000, roughly equal to Malaysia and only 1/2 of Taiwan. Per capita GDP is ranked only around 55th in the world.
Beyond that, 150,000 troops can't control 44 million people who don't want to be controlled. In fact, of those troops, only about 2/3 are armed. The rest provide support services. So, Russia will get bogged down in Ukraine and the military will fail.