A highly decorated officer of Kirk's stature has saved the planet from V'Ger and took out a maniacal space tyrant in the sequel, asks Starfleet to take the Enterprise to voyage to Genesis and he's rejected by a whole lot restrictions which couldn't possibly be implemented from the window of time the movie sets for itself. I honestly don't give a shit about what damn novelization explained things that III couldn't poorly do. Genesis is forbidden but New-Saavik and her science ship can explore it, just to get blown to bits??? The Enterprise was the great explorer* and could've handled a Romulan ship that happens to be Klingon if the writing didn't dictate that it would be shut down by one shot.
Kirk, Scotty, Chekov, and Sulu stealing the Enterprise and handling that massive vessel's ships operations is 100% prime bullsh!t. Only a movie as sh*tty as III could think that's plausible without an audience of laughter; there's a reason the ship requires a crew of 400 plus. Including the fact the ship suffered a vicious battle recently, TWOK, it definitely needed an operations crew to keep it stabled. Even after repairs, there would be a long series of maintenance overviewing the ship through space travel. No way an engineer would administer or support a dangerous travel through outer space when the ship was not satisfactory for even a full crew on board. Kirk was better off asking some favors to be aboard another ship and go its way than producing that clown show. The entire sequence was beneath the character and was a major weakness of that terrible script.
The stupid Klingon wanted Genesis, sees the planet is literally deteriorating right before his eyes; Kirk had to actually spell it out for this idiot and Kruge still wants to fight him??? As a matter of fact, what was the f^cking point to even bring Genesis to the table??? Star Trek was about exploring ideas with a sense of adventure, II was opening the palette to wonder even when things seemed quite grim while III flushed them down the toilet.
That horrible movie kept fighting its internal logic and scene after scene kept pissing me off.
That movie had a strange kind of Alien3 vibe, where "Aliens" had a nice set up to explore many avenues for characters and situations all intact and some a$$hole decided that it is not the franchise and kill them off.
*Before the one which was highly praised in the movie (USS EXCELSIOR) which didn't work. Best kinds of storytelling is when a ship is glorified to do Transwarp it should be seen, not told.