Chewy explains why here.>>342992
The thing to consider is that this is the first mainline Pokemon game on a home console. People have been anticipating something like that for decades
. I remember way back when Pokemon just started how excited I was at the idea of exploring a region like the Game Boy games, but in 3D. Now after all this time - with a couple of spinoffs to tease the concept, usually made by people other than GameFreak - we're finally getting that, and it's not even close to what it should be.
You look at Breath of the Wild or Super Mario Odyssey as these huge games that took the formulas those series established and went above and beyond with them. As a result, you have two of the finest Nintendo games ever, on a console that you'd think wouldn't be able to handle them. So for the new Pokemon to not only not be like those, but to actually cut
content is disappointing, irritating, anger-inducing, whatever adjective fits for you.
And this isn't laziness, it's very much intentional. The current head of GameFreak, Junichi Masuda, has said in interviews that kids today don't care about big complex games with lots of content, and instead want easier games they can pick up and play casually, like mobile games. Because of that, ever since the jump to the 3DS the series has been going downhill, losing more content with each iteration and focusing on gimmicks rather that improvements. Hell, that's why the Battle Frontier was cut from OR/AS.
So as a result, we have a game that's lost over half of the total Pokemon available, is focusing on a new gimmick for super modes that they'll drop for the next generation, and unless Sword and Shield underperforms enough that GameFreak has to undergo some restructuring and Masuda loses his job, it's not going to change.