It appears that the term "kingdom" applies to the "privilege" Asgardians have in their claimed territories. The Supreme Values outline the privileges citizens are granted in Asgardia. Essentially, Article 4, Section 3 "Asgardia’s absolute supreme value is humanity striving into the infinite future, the infinite Universe, and infinite new Universes" is a privilege you are granted by Asgard Society> You will always be supported in the effort to find new territory. You, nor any other Asgard, are required to actually pursue these ends however. Oh, you may not have noticed, but this provision covers time travel as well. Sure, we have limitations now.... but just around the horizon is an asteroid with more metals than humanity has mined through all of history waiting to be processed. Then beside it is thousands more and so on. I'm not sure why you derive this means it condones inefficiency and unsustainable life paths.
In your third gripe about the Constitution, this contradicts your first gripe against monarchy. The monarchy stood against the common person having a say. It appears that Asgard government is predominately meritocratic though it appears to be open to capture by more arbitrary distinctions like hereditary and friendship. Our worry should be corruption of its principles of equal opportunity and best service to Asgardia and humanity. I am uncomfortable with appointed officials, but I understand the short falls of pure democracy. I am willing to give it a try.
I'm pretty sure "official" languages are just languages Asgardia is required to communicate in. I'm not sure this is a relevant issue given where AI will be by the time it matters. People will have Universal Translators which can decipher non-programmed vernacular. I don't believe the "languages" should represent "culture." They are just sounds we make to represent things and the "cultures" of people from many languages are as diverse within as between.
Ya, the taxes thing seems like the hook. This could be the scam of it all. But hey. Just don't pay up and renounce your citizenship. I am not expecting "taxes" any time soon. These people at the top of this appear to be philanthropists with their own piles of wealth already accumulated. Personally, I've always considered it the responsibility of the rich to advance the welfare of all, which means also making poor people rich.
I don't understand the comment about Asgardia-1. Its just a jumpdrive in orbit. If you sign the Constitution, they give you a commemorative space in the orbital jumpdrive to put your information in. Its nothing really special. We already sign contracts to put our information in orbit, we just don't really store it up there. The waste would be to shoot it up there for failed bid at nationhood.... and you would have wasted a few minutes transferring some files to go up. You are wasting more time just writing this up though I don't really consider it a waste even if its for naught with respects to Asgardia.