Putin is playing games with Biden and NATO. He doesn’t want a NATO country on his border and is making a point. It doesn’t look like NATO is interested in including Ukraine in their membership so it will all quiet down in a while. Then it will be time for the US to pull out of NATO.
You are apparently unaware of the fact that there are already five* NATO countries bordering Russia. Ukraine would merely be the SIXTH.
Regards,
*The three Baltic states, Poland, and Norway.