I don't recall saying his invasion was correct. But if you listen to some of his points, the US has no problem invading countries (Iraq, WMDs) under false pretenses. The US calls out everyone else for actions it does regularly. The US calls out Russia for being corrupt (it certainly is) and then the US is one of the most corrupt countries out there.
There is something to the complaint that the Ukraine was not to be a NATO country, until it suddenly was to be.
Not gonna say U.S. has not done similar shit in other countries but Putin calling out the U.S. as corrupt as his defense for invading Ukraine is low shit justification for starting a war... wtf do innocent Ukrainians have to do with Putin's dick swinging contest with the U.S.
There were plenty of media outlets and actual politicians who spoke out against the war in Iraq for example....I doubt Putin has any opposition that he cannot kill for his actions in Ukraine.