Voltes V VS. Golion: What Could've Been Done With Emperor Daibazaal's Backstory? (Spoilers)

It's no secret that both Emperor Zambojil and Emperor Daibazaal are pretty much alike . Daibazaal is pretty much an Expy to Zambojil in many ways. Both of them take their anger out on their subjects, hardly do anything themselves, ultimately a coward (except Daibazaal died in battle rather anti-climatically), and they're both tyrannical rulers who oppress their own people. My problem with Galra is that it's hardly developed. Sure, we see some slaves here and there but we can't differentiate it if the slaves were from captive planets OR enslaved citizens of Daibazaal's cruelty. Nothing is known about how Galra came to be it was or did the writers want it to be Chaotic Evil. The only backstories known were that of Prince Sincline. It was discovered by the audience (but not Sincline) that Sincline was born of dual heritage. It can be assumed that Daibazaal probably married Sincline's mother at one point but later killed her. Sincline's mother seemed to be a mem...