Yeah he said that. Lost contact with reality tbh. Luckily for him, there are other parties involved who won't be so eager to watch Russia going down big style even if they aren't exactly allies. If NATO pwns Russia that sends the clear message to other "superpowers" they could be next if they don't follow instructions. And no one wants to be belittled and controlled. Believe that's the main reason there's no world wide conflict, rather than nuclear weapons. Soldiers can be stupid at times and following orders but I find it hard to believe any of them would push the button on nuclear attack when told by superiors. Happened in WWII because those dudes probably didn't exactly know what they were carrying in their planes.
Not even sure that Putin realize this isn't him vs the rest of world but rather Russia and the likes vs organized western world called NATO. He's probably delusional enough at this point to think "he'll pwn them all by himself, Governator style". But no matter how delusional he is, Russians won't turn his back on him. Not because he's particularly capable or awesome or anything positive really but because they are Russians. If his own kin, rich criminals who are now called oligarchs in attempt to preserve their fortune, try to replace Putin with someone western friendly, we could see history repeating and their heads on the Red Square (another Bolshevik like revolution). People who live good and fruitful life can't understand how miserable people feel, you can't rationalize it. Majority people in Russia live bad life and are super poor and can't afford decent living. Only thing they have left at this point is that thing of the past, where they were considered superpower everyone feared. They will sacrifice their lives and lives of their children if someone takes that away from them. They don't even need Putin for that, if he fails they'll find another one.
In recap, Putin might be madman but ordering nuclear arsenal to fire won't go through because there are still rational people on the top who won't agree just like were during Cuban missile crisis. Even soldiers won't do that, despite their indoctrination. They live better than average life in Russia. But milions of jobless and desperate people, give them the red button and world will be over in a second. That is what west should fear.