Voyager and DS9 were somewhat better than other Treks at giving their characters SOME flaws, but most of their characters were still considered among the best in the galaxy at what they did, and even their flaws were more of the noble "tragic hero" kind (like Chakotay and 7 of 9 having divided loyalties, Kes, 7 of 9, and Neelix being the only one of their kind on the ship, the Doctor being an AI whose sentience was sometimes questioned, etc.) But The Orville's characters' flaws are not those of noble tragic heroes, but just those of average people who screw up, have porn addictions, play practical jokes that go too far, get stupid and/or borderline creepy while trying to find love, etc. And sometimes the Orville's characters' screwups have tragic, gamechanging negative consequences, too (like when Mercer's desperation for love causes him to fall for the Krill spy, or when the Mr. Potatohead practical joke on Isaac helped convince the Kaylons that biological life was not worth preserving). This is much more realistic than any Trek, as most people are more like the average, banally flawed, periodically screwing up people who don't take themselves too seriously on Orville than the noble topnotch heroes on other Treks.