If we start with the fiction there's a "justice" system in eiher country, then it's not going to be improved if defendants can't be represented.
But Trump isn't a defendant here, he's bringing the cases. And I'm reasonably sure the same principle applies in the US that applies here, that although lawyers have a duty to present their client's case, they don't have any duty to present blatant lies as the truth. They certainly don't have the duty to act as Giuliani did in a recently reported case: he was suing states X and Y based on evidence of alleged misconduct in state Z's election. He didn't choose to sue state Z, because they went solidly Republican. You can guess which way X and Y went.