Pokemon Sword/Shield for me.
I really enjoyed the DS games, specifically HG/SS & B/W/B2/W2. B/W more so because the main characters were (slightly) older for once and having an entirely new set of Pokemon made things new and interesting.
Ever since X/Y, you can tell GameFreak has been time constrained and it shows with things being half-implemented. S/M was probably the best out of them, since most of the Pokemon were either new or regional variants.
SW/SH on the other hand is mainly older Pokemon brought back with some new regional variants and entirely new Pokemon. That and the supposed "improved animations & graphics" are laughingly bad. The frame drops in the Wild Area sometimes got even worse than the 3DS slowdowns when you had 3D enabled, and the Pokemon animations in that area are amusing in a bad way with the pop-in and movement of the Pokemon themselves.
Mix the lack of care that went into SW/SH and then the whole 'Dex thing (if you really like a Pokemon that isn't in SW/SH, hopefully you'll get a new/remake game that includes them, otherwise it's stuck in Home forever), and I stopped playing after getting to the third gym because if I have to spend a decent amount of time to get Pokemon in the end game that are viable competitively, playing a game where it's obvious to see the cut corners isn't worth my time when I have a ton of other better quality Switch games to play through.