Welcome @Dijana969 and thanks for being direct.
Social media bring Like-minded people together regardless of how far apart they are in terms of distance. Like-minded people Includes multitude of things not only relationships, People who share the same passion, interests, mentalities, and whatever might be mutual. and it is up to them to get off their screens and build something more tangible.
As example, I love reading but no one in my entourage share the same hobby. It was through Facebook that I found a group of people in my city starting a book club in a bookstore. I joined them, now we are friends for almost 4 years.
When it comes to dating, if a couple is distracted by social media and not being fully with each other, they shouldn't be together in the first place. through social media you may find new people, meet them in real life and start a relation which might succeed or fail like any other relations. I didn't mention staying behind the screens which is completely pointless.
Hope my point of view has been clarified in this comment.