It's not unethical for a lawyer to try to get the best possible judges into office so long as no favors would be expected, just like any citizen could do so, but would be hampered by not knowing whether the person running for judge was competent (it's often hard to tell).

BUT if your ex's judge accepted large sums from the lawyer or had that lawyer as campaign manager or whatever, and did not disclose this to you before starting the trial, then it could be a problem. You might have the right to ask the jduge to get off your case. Check with the bar association to see if there is a rule that would give you cause to complain.

BUT... if your ex's lawyers help to the judge came AFTER your trial, then it sounds like they liked what that judge did and wanted to make certian that judge stayed in office. Not unethical at all.