Putin saying USSR won WWII, he's not completely wrong.
It's not going to happen while he allows the hackers, scammers and blackmailers in his own country to wreak significant financial and physical damage to other countries via the Internet. It could be argued that he is waging a covert war against Europe.
Germany Lost World War II because they were not strong enough to fight on two fronts. Putin's claim of winning the war is typical of his strong man persona. His claim is insulting to the other allied troops but he doesn't care.
Russia did take the brunt of the fighting & losses in WWII in Europe. As much as I'm not a fan of Soviet Russia, this fact is seldom acknowledged in Europe & the US.
They were also as despised as the Nazis in the countries they ransacked on their way to Germany.