being in a relationship is too much trouble.

Everyone makes their choices. I wonder if you will always feel that way though and I also wonder what people miss out on. For example, it is also too much trouble to cook a good meal, since survival doesn't require flavour. But what is worth "the trouble".

I think a big problem is social media showing us perfect relationships even though they aren't. People have become too idealistic and since they realized that it is impossible, would rather not go through it anyways.

It is a massive problem. People are idealistic to the extreme, unable to deal with anything that doesn't meet their expectations. And since nothing will, they settle for a life less than they are worth.