“90% of developed countries allow the indefinite reelection of their head of government, and no one bats an eye. But when a small, poor country like El Salvador tries to do the same, suddenly it’s the end of democracy.”
The difference is those governments usually have civil liberties etc that constrain the government. (The erosion of which is partly why trump is so concerning.)
Bukele has been arresting journalists and politicians he doesn't like. If you are arrested you effectively have no recourse.