Got to take into account, that Russia is surrounded by 30 Countries that comprise NATO, basically a US dominated alliance, that is in control of the Pacific and Atlantic Oceans.
Putin is basically a 'Dictator' who is taking Russia down, through corruption and illegal money, but he has the right to fend off threats to Russia. After the regime change in Ukraine, 2014 intiated by the US he panicked, the infiltration of Ukraine ny NATO troops was an act of aggression and unfortunately he decided to respond with an invasion.
The awful thing is, that besides the US expansion into the South China Seas and the threat to China, provoking further conflict, the US military machine is churning out billions of dollars woth of armanents, on sale to Europe and anyone they can sell to. The US have been in a perpetual war for as long as I can remember since 1946, but when defence was necessary aainst the Germans in 1914 they turned away from our defence, until the Lusitannia was sunk and two years later the Germans continued to sink US ships bound for the UK, then they entered the war in 1917 when Europe was in crisis, and not until the Japs bombed Pearl Harbour did they help in our battle against the Nazis.
Unfortunately Putin's reaction to the NATO advance was not the way to go, but he warned the US to stop their encirclment of Russia or they would respond with aggression.
The result a real threat of a Nuclear War. What a bunch of pricks the lot of them, Putin and the US war machine.