Trump is not a king and is destroying the country.
Charles is a king and is doing a great job.
And they also get to exempt themselves from laws they don't like, like racial discrimination laws (well into the 1970s, brown and black people were deemed unfit for anything more exalted than cleaning toiletsat Buckingham Palace). Or the Cornish or Lancastrian tenants of the crown who have far fewer protections than any others in the UK.