Just like he conducted his businesses, in his mind, a "good deal" is one where he wins by any means necessary...and the other party loses.
Trump thinks a "win-win" means he's losing something.
That's NOT how diplomacy and trade work...
Trump fails to grasp the idea that the U.S. benefits greatly from the success of our European partners...especially Germany, which produces an large proportion of its cars HERE in the U.S....
Moreover, Trump has called for the U.S. Fed to cut rates, but is angry when the European Central Bank does just that.