To be honest this actually makes it worse, in my opinion. Nintendo knew about a similar problem before and did nothing to patch it. Counterfeit SD cards are incredibly common. Most people aren't even aware that their card isn't legit until it has some kind of catastrophic problem, and frankly, there's no reason to suspect a counterfeit card if it's worked for every other game fine up until this one. Fake cards are common enough that Nintendo should have patched this issue, and Game Freak should have tested for this. So many things about this game feel rushed, half-half baked, and untested.
Everyone expects small launch bugs. The key word here is small. They don't expect a potentially catastrophic failure from a AAA title.
EDIT: Actually this is irrelevant - the Italian Reddit user is saying that
he doesn't have an SD card in his Switch at all.