Congress has the sole constitutional power to make money and set its value. What Congress did with this power was to abdicate it to the executive branch to determine the amounts thereof of the monies in circulation. So while you might want to scream "orange man is bad" which I do agree there has been several bad decisions, this one is because the absolute failure of Congress to do the job that it was empowered to do by the Constitution.
So put the blame we're blame exists. You get to re-elect a massive portion of those congressmen every two years. So you don't have to wait for the "bad orange man" to leave office. Most of what people cry about that Trump is doing is actually because all they seem to focus on is the president and never about the Congress which has abdicated its power in many places to the executive branch. Because Congress seems to have its sole focus on getting reelected and not actually managing the portions of government that they were empowered to do by the Constitution.