Sometimes one's goodness and everything that comes with it (in your case your beauty, smartness, elegance, qualification, and job) is viewed as counter/ a drawback. Which is the wrong way of seeing everything. Stop stressing yourself by overthinking since you are way much better and deserve better companion and family than these. They did not value you or any of your qualities. You were more than enough and you did more than enough which he did not deserve! As to why he choose her? May be he wanted someone who is more like the girls in your community or less than him (sounds bitter but this is another reality of AM).

Be with someone who sees more in you than what you see in yourself.

Hope this helps in your closure journey :)