I honestly have zero problem with people having "unrealistic" standards. You can restrict your own pool as much as you like, as long as you don't complain about not finding any partners.

I (and people in general) have no right to be upset at not meeting what we see as "unrealistic" or "unimportant" standards held by people we are interested in. We are not entitled to a relationship.

(I do think it's kind of sad when e.g. I talked to a friend of mine who had a sense of attractiveness so strict that she literally could not find someone she found physically appealing within a hundred mile radius. She said she could go months out and about in a major city and not see a single man she found physically attractive. It's very much not the experience I've had, I see reasonably attractive people everywhere, so I wonder what people are looking for who say there is nobody even worth considering anywhere around them?)

Edit: to be clear, I don't mean she couldn't get dates with people she found attractive, she didn't see anyone attractive at all. Her "type" was incredibly strict: between 6' and 6'2", wavy blond hair, medium length, athletic without being too "muscular", and no brown eyes. She showed us pictures of her past boyfriends and they could have all been identical twins of each other, it was absurd. But hey, again, more power to her, nobody has the right to demand she relax her standards for them.