This is a very valid point, so why do people keep insisting on Gamefreak having a longer development time when it comes to Pokemon games?
1- Very poor performance (bad draw distance, bad FPS, bad textures)
Uhhh, yeah. These are pretty good reasons why people want GF to have more development time.2- Games seem unfinished (menus instead of models for stores, towns with nothing to do in them, towns that are a fucking long corridor)

We know that GF has been hiring more people, so it's not manpower. It's kind of unbelievable that they're only hiring grunts who can't code anything but fine Italian spaghetti, so we can count out skill issues for the most part.
And then there's the elephant in the room.
Cut/barebones content and poor optimization are more often than not related to time constraints and short dev cycles. Pokémon is the poster child for both.
Because one year wasn't enough.It's clear that the developers of Diamond & Pearl did exactly what fans want the developers of the newer games to do nowadays. So in that case... why do Diamond & Pearl still suck?
DP was a MASSIVE leap from Emerald in a lot of ways, including the leap to 3D. Yes, I'm aware it's mixed with sprites, but it still counts. DP, to put it bluntly, had more than its fair share of issues, which explains why even this franchise was willing to hold out for another year because the result at the time was likely unplayable.
Ironically, there's more to this story than meets the eye...
The common consensus opinion seems to be that the developers, usually Game Freak but also ILCA since the release of Brilliant Diamond & Shining Pearl,
BDSP is NOT an example of a game that needed more time in the oven.
It may look like it because everyone got their hands on 1.0.0 and noticed things like the soundtrack being midi placeholders, the lack of an intro, and chunks of the game missing.
But 1.0.0 was never supposed to be the final product. The final product is what we got after the Day 1 patch, which, as the name implies, was ready on Day 1.
BDSP runs perfectly on a Switch. It doesn't suffer from performance issues like say, SV.
The issues with BDSP are completely different. They're direction issues. That game is a mire of bad decisions.
Forced Exp. All in a game that's obviously not designed around it, ignoring all of Platinum's fixes, Affection not having a soft cap...
These are bone-headed decisions, straight up. This is not a team not having the time to optimize a game, it works perfectly. It just shouldn't have been designed that way.
The decisions taken when it comes to many things in that game are just baffling, that is the kind of thing that more time doesn't fix.
The technical issues from DP were fixed. No more "saving a lot of data", slow engine, and poor AI implementation. BDSP's issues lie at a conceptual level because Masuda wanted a faithful-to-a-fault remake. This is why, barring the Frontier and some details, modders recreated Platinum out of it in a matter of weeks.