You’re deluding yourself trying to explain russian millitary failure as some sort of advanced move. Remember the intense fighting at Hostomel airport? The huge column stuck on the road to Kyiv? They totaly thought Ukraine leadership would flee and they’d be able to take the capital.

russian speaking land

what makes you think russian speaking people support Putin’s regime? They don’t. That’s like assuming Zelenskyi supports Putin’s regime because he’s a native russian speaker.

US didn’t force anybody to join, countries in eastern europe applied to join because that meant they were less likely to be bullied by Russia. Look at what happened after Russia invaded Ukraine - both Sweden and Finland applied to join the alliance. Do you blame US for that too? It’s Russia’s aggresive stance towards it’s neighbours that caused the expansion of NATO.