Well to be honest, this is what I would call normal for a MMO release. Even if it's an early access release.
I rememer when WoW launched, they had huge issues aswell. More severe than this, and it took them several weeks to get it sorted out.
But it's getting close to a decade ago now so I guess people have forgotten stuff like that.

Yes it's annoying that you can't progress main story due to some quests require you to do duty finder things. But you can still gather people the old fashioned way to do dungeons. And you can do leve's with the allowences you've gotten so far. And there's fate's around the world to go to, crafting things, gathering things, hunting logs etc..
So stop whining about EVERYTHING is broken.

Is it a vital part that's broken? Probably yes, but it's not like you CAN'T play the game..

Enjoy what you can and the issues will get fixed sooner or later.