the structure is wrong. It has to be switch/games/splatoon2(or whatever you want to write)/and then what you have, atmosphere etc
Also that donor ID, isn't it mario odyssey? Is that going to work at all choosing dragon quest builders?
It is working for me with Splatoon 2 - PokeQuest as donor. Also deleted config.ini
Does the homebrew menu crash for y'all too after testing the games? Or are you swapping successfully after exiting the game?