I'm pretty sure some of them are objectively broken. I had a mission where the mission givers partner was seeing someone else and I had to figure out who. The process of figuring out who the person was was pretty cool. Outside of some vague physical traits my leading clue was the mystery persons partners job position. I had to look up every restaurant, break into every single restaurant, find all the people who worked that position, find where they live, break into their apartments to find who their partner was and if they match who I'm looking for.

Eventually I was 99% sure I got the right person, but I needed proof they were seeing each other. I combed their entire apartment, found nothing. I combed the partners apartment, found nothing. I checked their workplaces, found nothing. I tailed both of them the entire day, still found nothing. I even checked their mailboxes and found nothing. I literally ran out of ideas how to solve the case because I found nothing.

Turned me away from the game because I got this cool investigation with some really out the box thinking, and then didn't get rewarded because I didn't find that last piece of information.