“What’s also concerning for many is that Merchan was not randomly selected, he was hand-picked as the judge for this case, and many of us don’t understand it,” Turley continued. “You have a judge who is donor to the president, whose daughter is a major Democratic operative, you would think this would be an easy call, there are plenty of other judges.”

Turley's wrong. He was chosen at random:

Lucian Chalfen, a spokesman for the state court system, said Merchan had been randomly assigned to supervise the investigative grand jury, and that judges who supervise such probes are then assigned to try any cases that come out of the grand jury.

nbcnews.com - Know juan merchan judge trump indictment case

...is the way it's supposed to be, but as we've seen, things aren't functioning as they should be.

They're functioning exactly as they should be. You don't get a recusal from a judge because they have an adult relative who works at a firm that supports a political party (or cause or whatever). You don't get to throw out a judge because they're a Democrat or a Republican - nearly all of the country has political viewpoints, even strong ones, and fairness does not require that judges be limited to the tiny segment of the population that holds no views on anything. Sometimes a judge is a progressive Democrat; sometimes you get a "hangin' judge"; sometimes you get a judge that's made no secret of their philosophy on various and sundry issues. That's what happens - you get a random draw, you have the right to request a recusal for actual bias, and complaining about the fact that a Republican might go on trial before a Democrat (or vice versa) reflects a fundamental misunderstanding of how the system is supposed to function.