Sprites are more expensive to make than 3D models yet they still managed to make a new set for each generation of pokemon, two almost unique sets for generation 2, then they animated those sprites for Crystal, they had a new set for every pokemon in Ruby and Sapphire, a new set for the Kanto pokemon for Fire Red and Leaf Green, they then animated the front sprites for Emerald and added effects for the back sprites.
They made 493 new sprites for Gen 4 with some male and female differences, all animated for the front and with added effects for the back they then made a whole new set for each pokemon that appears in the Sinnoh region with animations and they added backsprite animations for Platinum, they then just under a year later made a new set of 251 with animations for HGSS, they then fully animated the sprites for Gen 5 and in the second games they gave new animations for the starter pokemon lines and fixed Samurott's ugly backsprite.
Gen 6 they made some new models of every pokemon which was good but that was almost 8 years ago.
There has been no progress in those 8 years in terms of what the models do.
And they are all still washed out with simple palette hacks showing how easy it is to fix them.
So yeah, we're not happy with how shit the animations are after 8 years.