I applied for System Analyst vancancy. I got the interview. I went for the interview. Today I received an email stating that I've not been selected.

Inner me: Rejection is part of life. Hang in there.

Rejection emails are soul crushing for me too, unless they say why.

reminder: rejection is part of life.

reach out through email or phone and ask for specific reasons (a lot of times they wont give you one but its important to ask anyway).

Thrn have fun A/B testing resume variations.

You also might be surprised by the answers you get.

Asking for feedback is not rude or intrusive in the least bit. Managers and executives are by their nature communicators. If you can get ahold of an actual person do so, instead of talking to the lizard people that run most HR departments.