Judges are used to defendants’ excuses and rationalizations and special pleading and ranting. So Trump is not much different than many if not most defendants. It will therefore not be so difficult for Judge Curiel, or any judge in other Trump-related legal proceedings, to be fair.
But most defendants, from the lowlife petty criminal to the high-stakes masterminds in the 1% of the 1%, are wise and savvy enough to let attorneys speak on their behalf. Trump, the exception here, nonetheless proves the rule: as he continues to insist on pleading his own cases (political as well as legal) he has a fool for a client.