Although with the current invasion of Ukraine over the last 3 weeks, due to state-owned propaganda media, Putin temporarliy enjoys 90% popular support inside Russia. Once the truth seeps in, and the crushing effect of economic sanctions, that support will decline.
With no one else to turn to, Putin has basically sold Russia into slavery to China, its only ally capable of sustaining Russia through this economic exclusion from most of the free world. Russia is sustained almost solely by its oil industry, and China is buying Russia's oil, but at a hugely discounted price. China and Russia 5 years ago began a somewhat secretive economic and military alliance. At the time both were world powers, but it is clear China is now the senior partner in that alliance, with Russia now completely dependent on China.