Adding onto, i feel like the EXP is def too slow. tried running a kanto start but leveling took forever and the only way to increase it is through satisfaction. Adding to, that EXP bonus only goes up to 1.5X, and is slow to get satisfaction at the current speed of the game. To get satisfaction, you gotta do the H-Scenes, but to raise the hearts on a character, you gotta battle them weekly, talk to them daily, and give them a favorite pokemon. The main problem about those, in my experience, is that nights last forever, so you end up stuck on the same day for a while. Since youre stuck on the same day, you cant talk to them daily to raise their hearts, and then weeks take so much longer to pass so you also cant battle them frequently enough to get to the H-Scenes soon enough.
Since the EXP is so slow, you cant progress into new areas unless youre constantly abandoning your teams for new mons, as switch training is atrocious with the EXP rates. I'm currently trying a 10X exp 5x cash run with cheats. It feels a bit fast, but it does flow a bit better as I can actually do stuff.