I'm too small brain to understand the whole monopoly in my own business aspect. Because they are not arguing about game exclusivity, you can buy the same game most of the time on Xbox, Switch, PC (and if not that's an entirely different story) but the fact they want to buy on that platform (Playstation) but from a different store (not Sony). Can't wrap my head around that logic.

Taking Switch as an example, I can buy digital games at Walmart or Amazon. For instance, Amazon might have a sale where their price for a given digital game is ~10% lower than Nintendo's eShop.