I thought that's what happened and then they started the invasion in February thinking "well take Kyiv in 3 days so why bother planning ahead".

They were naive and foolish.

Ukrainians will be fighting Russian aggressors to death.

Well, that means they'll die.

Yes, Captain Obvious, aggressors will die. That's the whole point.

In Kyiv on May 9 2022, a traditional parade will be held in honor of the victory of the USSR over Nazi Germany. It is naive and foolish to doubt it.