NATO’s having a presence in a member state is protection. It reduces the chance of opportunists like Putin invading.
Putin tried to call NATO’s bluff, using Ukraine as a bargaining chip. NATO didn’t blink, and so he started a war. He doesn’t get to do the abuser thing of saying “see what you made me do”. This is on him, and him alone.
He can demand that NATO withdraw all he likes, and I’d have some sympathy for that if it didn’t involve invading another country as leverage. Note, I say some sympathy, not that NATO should actually do it, especially as Putin’s regieme has threatened other countries already.