Like honestly, there’s doesn’t need to be an Angsty origin for Nightwing. NOBODY WANTS TO BE A KID SIDEKICK FOREVER. MOST KIDS WANT TO MOVE OUT OF THEIR PARENT’S HOUSE EVENTUALLY.
That’s literally what his original origin is in the comics
Dick:“well i’m an adult now, I have my own team, I still love Bruce but I don’t feel comfortable being a sidekick anymore, time for a new identity, Bruce I’m moving out”
Bruce: “ok good luck you are an adult and I trust you to make good decisions.”
Dick:” HELLO DISCO COSTUME”.
Bruce: “Dick...why...”
Later they angstified it because comics can’t leave well enough alone but YEAH. i mean THAT’S LITERALLY ALL IT HAS TO BE.













