system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] Why is Asgard so backward in terms of technology??

They still use swords, shields and spears. Their aircrafts are weak and (i think) not capable of space travel. Their air defense couldn't take out 5000 year old ships. They rely on the the bifrost as the primary source of transportation. 

What's weird is that the Dark elves who reigned during the the time of Thor's grandfather were advanced enough to use guns and various other technologies and are better than modern day Asgardians. 

I feel like Yondu and his Ravagers could easily invade Asgard if it weren't for the main characters. 

They probably won't stand a chance against Ronan The Accuser as well. 

How could the protector of nine realms be so backward in technology.
gpt
They're bored.

Asgardians *have* interstellar travel technology, and their guards use (energy-based) projectile weapons, but the leaders of the Asgardians are nigh-immortal and can level cities without much trouble.

Their warrior culture is so ingrained in them, though, that destroying an army from afar just doesn't seem honorable to them. Because of that, those techniques have been (mostly) lost to time.

And while they do throw themselves into the thick of things, it's not like they've greatly reduced their offensive capabilities. Mjolnir looks like a hammer, but it acts like a nuclear weapon ... if Thor wants it to. Similarly, the bifrost was a much more efficient means of travel than any spaceship, at least until Loki messed everything up.