That much was also pretty clear in ST4: Starfleet wanted to keel-haul the mutineers, but the public wanted to beatify them. So, they get a replica starship and avoid jail, but as soon as they have had their fifteen minutes of glory, they have to face reality again: they don't get promoted and they don't get good assignments.But it if was all a PR stunt, why did they send them to deal with the hotspot on Nimbus III?
Yeah, even from the first time I saw the movie (and for the record, I like STV) I got the feeling that it was meant to be a failure.
All three govts. didn't give a damn about the place; Starfleet sent one of the one commander guaranteed to cause a shitstorm in a busted ship and the Klingons sent in a trigger happy glory-hound who gets a woody at the thought of taking on a Federation starship. It was like both govts. were trying to trip off a war, just a race to see who pulled the trigger first.

) that in the short space of time between STIII and STIV (a matter of mere months?), Starfleet goes from wanting to decommission the Enterprise (doesn’t Admiral Morrow say something about it getting too old?) to giving Kirk another, almost identical ship. If they could simply retrofit another Constitution Class, let alone building a new one from scratch, why would they be decommissioning Enterprise? Were they that confident that Excelsior was going to become the front line ship design?