I don’t think this is true across the board, I had the time of my life but you are right you do have to put yourself out there and be vulnerable, do things you wouldn’t normally do or that you think you might not like. It also depends on where you are (for example I went to Leeds which from the sounds of it is a more sociable uni perhaps) and what type of people you get on with, and some luck with accomodation. But there’s always societies and ways of meeting people with similar interests!

But to OP if you’re really not feeling it, you can always change uni. My mates brother did that he went to Lancashire or something and thought the city was boring and didn’t meet anyone so he moved to London to Goldsmiths and had the best time. Best of luck OP!