Think you can probably point to social media as a major form of relationship anxiety causes
Few off the top:
-The performative nature of the relationship on social media, the idea that you could start posting pics with a guy for a few weeks or months, and then break up or whatever, and your narrative is now changed/weaker, your identity/brand takes a hit
example: you rant and rave on social media and in person about husbands and kids and family, and only want a husband, and then meet someone, and break up 3 months later, you now look foolish or diminished, like your identity as a traditional woman is in question
I know women who clear out all their social media after a break up, an attempt to cleanse, or delete all the pics of the person, an attempt essentially to save the brand.
there's an inverse for men too, where you rant and rave about a good woman, I found a good one, (she's faithful and therefore I am wise is the subtext) and then the same thing happens. Your expectations are not met. And everyone knows. Your judgement is questioned. You look foolish in your own little world.
-The ever tightening and changing rules around things like cheating
everyone is hyper paranoid and hyper vigilant about not only their girl/boy friends behavior in person, but on half a dozen apps. It raises all these questions: who can tag you? Can you tag people? can you like people's pics? Can you DM people? Can you read your DM's? How many pics should you post?
People are the most rule based and intolerant that I have ever seen in my lifetime, because there's so many new spaces to navigate for them.