instead of perfecting the gameplay mechanics from last gen and make everything more smooth and responsive they just boosted resolution and textures.
That was the problem with 7th gen. Framerates especially took a hammering as a bigger western audience cared more about polygons and lighting. RIP 60fps target :(
Personally I think things are improving again. Nintendo is back to making my style of videogames, indie has helped ressurect what were long lost genres (platformers) and okay the visuals aren't stunning, but there is a lot more 60fps stuff than there used to be.
Granted there has been a bit too much entitlement on the "audience" side but hey ho, it seems to be dying down again now.