Trump has long been known as gathering yes-men and sycophants around him who will keep reinforcing his own self-destructive tendencies as opposed to people who who tell him what he should hear, even if it is painful. This is a behavior commonly scene in third-world despots, not American Presidents.
The President has also done this with his own staff. Chief of Staff John Kelly is widely seen as a moderating force in the White House, but Trump has marginalized him and is reportedly trying to ease him out the door.
Trump did the same with his National Security Advisor, H. R. McMaster, another moderating voice who was pushed into resigning and will be gone next week. He will be replaced by the inflammatory John Bolton who is widely known to be another Trump coddler who caters to the President's worst instincts.
Searching for historical models for this disastrous style of executive management in the White House are not difficult. Both George W. Bush and Richard Nixon were notorious for surrounding themselves with ego-fluffers who simply parroted back what their Presidents said to them whilst shielding them from the truth as a result.
It's no surprise then that Trump, the younger Bush, and Nixon are all ranked by historians as three of the worst Presidents in history. There is every sign that Trump will continue to double-down in this self-destructive tendency, but unfortunately the American people and the nation will suffer as a result.