Trump is insisting on Ukraine paying for donations already freely given for the war (ie, they were gifts from the USA). They proposed they be paid for with mineral rights, and give nothing back in return. The minerals they asking for are worth far more then the USA's donations top date. Ukraine's initial reaction was a flat "no".

Then the Ukraine changed their minds and said, well actually you can have the mineral rights for free - because we desperately want this war to end. So you can have them if you give us a security guarantee that prevents Russia from overrunning the place. Otherwise we must continue to fight for our homeland.

Trump has responded "no", because he's only interested in peace.

I guess it makes about as much sense as anything else he's done.