>>54496841>>54496989All of Kieran and Carmine’s Pokémon have 25s in every stat, viable moves, and optimal natures or Hardy.
If you are using a fresh Kitakami team with Pokémon you can catch on Kitakami Road just outside Mossui Town, I can see why you could lose.
Boss trainers in base SV have 20s in every stat (the ace has 25) and all Hardy nature. No Adamant, Jolly, etc.