Every single person has some kind of weirdness or baggage that makes them some person’s version of 100% undateable. You. Me. Them. Everybody! Fortunately, we all also have qualities that make us just what someone is looking for.
Attraction is subjective and unfair. You can’t force yourself to feel it when you don’t. And it’s possible to feel very attracted to people who don’t make good partners for you.
Rejection (or lack of connection) is totally normal. You can/will meet lots of people who are perfectly fine/great/awesome, whatever but who aren’t right for you and you aren’t right for them, and that is okay. You don’t have to know that right away when you meet someone and you are allowed to take a little time to figure it out.