Most of the time they are not. Think about it.

What is the point of dating someone if your goal is a long term relationship or marriage if you know that

1. One or both of you aren't ready for marriage.
2. Your desires within that framework, like if and how many kids you want, do not align
3. Your lifestyles are gonna clash to the point of making one or both of you miserable.
4. One or both of you is a Trump supporting conspiracy theorist and the other lives within reality.
5. Religious convictions/faith traditions clash.
6. One or both of you are not financially solvent enough to enter marriage.
7. One of you has needs, perjaps special considerations that thenother just cannot meet.
8. You're sexually mismatched to the point of one or both of you will never be satisfied.
9. One or both of you is too emotionally immature/unstable to do the work in good faith of maintaining a relationship if you entered into one, leaving the other drowning while the first holds their head under water.
10. One or both of you know damn good and well you're not in a good headspace for whatever reason to be both honest, open, and invested in that level of serious dating (not to be confused with dating for practice, have fun, generally socialize, or even hook up with the caveat that you're being honest about your intent both to yourself and the person you're dating).

None of those are personal about someone's worth. They say absolutely nothing about someone's inherent value on this Earth. They're just life.

If it was possible to pair off successfully and happily with literally anyone, we would have stuck with arranged marriages or do some kind of lottery draft instead of making ourselves crazy going through all this drama, don't you think?

Most of the time someone rejecting you is more like:

1. Them honoring the value of what fulfillment in marriage is supposed to look and feel like.
2. Them doing themselves a favor.
3. Them doing you a favor.
4. Them doing you both a favor.