He absolutely is using his authority to do things no President ever had the instincts, intuition and/or courage to do before. That's what makes him so successful as he is achieving more with the time and resources he has than any president in my now very long lifetime.
He isn't a politician, partisan nor ideologue and he extremely annoys those on both sides who are. He thinks outside the box, ignores the status quo, ignores those who say this or that can't be done. If his personality can be somewhat obnoxious at times,. his track record has been pretty awesome.
Has he made mistakes or taken longer than he hoped to get something done? Of course. He's human and fallible as all of us are. But he is successful far far FAR more than he isn't.
Exactly how is it using and abusing his power to achieve good things for America and Americans he is sworn to serve as their President?
Exactly how is it using and abusing his power to fire a swamp creature in his intent to restore a government that serves the people instead of itself as it was constitutionally intended to do?