People overlook that "Utopia" literally means "no place." Thomas More coined it as a pun on "Eutopia," "good place," as a way of pointing out that an ideal society does not exist. The whole point of the word "utopia" is that it's an impossible ideal, something that can perhaps be moved toward but never actually reached. So any story that portrays a utopia is unrealistic, as is any philosophy that purports to allow creating one. Realistically, one can make a society better, but never perfect.
Replicators + space travel = post-scarcity. You can get all the resources you need from asteroids and all the energy you need from stars, and replicators can turn any material into any desired product in an instant, with no need for human labor, and with no material waste since replicators also allow total recycling. There's no way the 24th-century Federation isn't post-scarcity.
I call foul, since that was explicitly during a period when martial law has been declared. Martial law is, by definition, an emergency suspension of the normal rules, so what a president can do under martial law doesn't say anything about how the system works normally.
All you can say from that is that there's apparently a lack of privacy within Starfleet. You can't presume it's the same for civilians.
No, that's not it at all. As "Journey's End" established, the final treaty that resolved the Federation-Cardassian War entailed redrawing the border, so that, as Picard said to Admiral Nechayev, "This border places several Federation colonies in Cardassian territory and some Cardassian colonies in ours." Picard's mission in "Journey's End" was to evacuate the Federation colonists, but they chose to secede from the Federation and accept being Cardassian subjects rather than leave their homes. But the Cardassians abused and harassed their new subjects, and the Maquis was formed in response to that.
That's just dramatic shorthand. Of course it wasn't meant to portray the Federation as dystopian -- that's taking a storytelling shortcut too literally.