>>48263728>>48263728A story isn't poorly written because it's simple. Overall, Platinum's story, and DPPt's story as a whole, is very good.
Although, I will say that DPPt's most glaring narrative oversight is probably how useless many authority figures are when it comes to addressing Team Galactic. And I'm willing to bet this is something many other players at the time felt too, considering the Gym Leaders in Black and White all take an active role in addressing, investigating, and eventually, disassembling Team Plasma.
However, to DPPt's credit, this does, at least in part, seem to be intentional. Various NPCs comment on how peculiar Team Galactic's members are; they dress like spacemen and speak strangely, and it freaks people out. Cynthia straight-up admits that she dismissed them as a silly group until finding out what they were getting up to and is shocked. Also, the first few times you interact with Team Galactic, they're running small scale operations in areas far away from League attention. Like when they stick up the Professor on the outskirts of Jubilife, or when they storm the Valley Windworks, both places far away from Roark, Byron, and Gardenia, and THAT's really cool.
But when you get to Eternia and learn that Team Galactic has abducted a Pokemon that's in their building, it begs the question; even if she couldn't go and get Clefairy back, how did stories about this event not get back to Gardenia, and why didn't she alert people? I guess she could have done so off-screen, eventually, but it never really comes up. It stands to reason they would be more behaved in Veilstone, and they have a built-in excuse of not being able to supervise their Eternia divison staff very well, because of the distance between the buildings, but it never really comes up, and it's weird how Gardenia never comes back to mention it. It basically happens in her backyard.
All that aside, Team Galactic is still one of the cooler villain teams in the mainline series.