My point is that there is no practical alternative to using booking.com for hotels, and therefore they treat costumers as they please (very bad - during and aft

My point is that there is no practical alternative to using booking.com for hotels, and therefore they treat costumers as they please (very bad - during and after the sale) and charge whatever they want (very high). It should be “the free market” driving price formation and market share. Clearly, this isn’t happening here anymore. But like the Covid vaccine purchase fiasco, EU regulators will just sit idle cozying up to big business instead of standing for the interests of their citizens. The fact that a project like the OP even exists is screaming proof of what I’m saying: if booking.com wasn’t indeed operating as a monopoly, wouldn’t the “free market” drive out the use of Booking’s notorious stress / bullying sales practices?