While I cannot speak about Putin or Kim, I take issue with your assertion that Xi is a brutal dictator. China is not USA and their government is based on different cultural mores. Xi has been no more authoritarian than US Presidents and he’s not presided over wars and incursions into other nations. He and Trump are entirely different, as Xi has been around normal people and government for most of his adult life. Trump has not. Xi has come up through the ranks of the civil service. Trump certainly hasn’t. Whether you like it or not, Xi is a unifying leader of China. Trump shreds US society.
Don’t confuse or conflate the 2. They’re not analogous.