In the last Trump administration there were enough people handling him. This time there are only yes men, so anything we see, is him unstopped/unfiltered. Trump doesn't understand complexities just "winning", he understands that minerals are valuable so he wants them, that is it. He also wants the peace price, but he doesn't understand long term strategy or planning so this situation, this sudden shift and strong arming is him wanting to accomplish this goal now. He feels Putin is stronger so the goal is easier accomplished by forcing Ukraines hand.

If one views it trough the lens of: What a high school bully, who has no self control and can't delay gradification, would do... then nothing Trump does is surprising.