Russia has a right to protect its borders. Colonial war? Sure, but if Canada or Mexico was thinking about allying with China and Russia you can bet your ass that the United States would have no problems invading those countries to protect its regional interests. Russia has been provoked by NATO for years, going back to to 2005, why shouldn't they defend their interests like any other nation? As for Zelensky, his cronies getting busting for embezzling hundreds of millions of dollars doesn't sit right with me, especially when his government kidnaps regular joes off the street and sends them to the meat grinder with no training.
It might appear like a terrible performance but the Russians are now experts in drone warfare and have experience fighting against Western tactics/technology.
And they didn't retreat from the Nazis at first, the Wehrmacht absolutely battered them, capturing whole armies in the process. Despite that, even with the early successes, the regular German infantryman was impressed by the Russians tenacity. Read about the capture of Sevastopol for example. Trust me when I say this, a war between Russia and the United States would be a global catastrophe.