Now thanks to the internet and other technology advances, travel is more accessible (Google Maps), cheaper (flight and hotel comparison tools), and more people are doing it. You also have entire nations that are traveling now in ways they didn’t 20 years ago (e.g. China).
Yes, this all means more crowding and it is less pleasant. But social media is just one small input in all of this. The only way it returns to “how it was” is a return to a more exclusionary travel world.
(I expect someone will make a comment about hostels and backpacking. I’m not refuting there were means of travel that were more affordable and accessible. But we’re talking about mass accessibility and availability across all markets.)