[Phrodo_00]

Neither generation of Switch Pokemon games looked or performed decent, but I guess bad performance is a gamefreak constant since at least the 3DS

[Izkata]

I assume you're referring to Sword/Shield and Scarlet/Violet, but Legends: Arceus is also officially part of the main series. Offhand don't remember performance issues in that one.

[faizmokh]

Arceus is amazing. I never bothered to get Scarlet/Violet because to me they're a regression and just look like a lazy attempt at money grab.