Everything you've just said does nothing to justify the repeated use of the same "let's become a democracy!" plot that has been used 4 times already.
Also theocracy via the pope is not the same thing as a monarchy, as far as I am aware Thordan was chosen to be Archbishop from within the Church and his name "Thordan VII" refers to the fact that he is the 7th Archbishop to take the name of Thordan. It isn't his birthname.
Ala Mhigo was a massive failure of writing from multiple fronts but "yay democracy!" won out over the inclusion of any potential surviving royals (Larsas, Garnets, Ashes, etc) that could have been written into the plot, but weren't. Same thing for Garlemald.
Eulmore's resolution was lackluster after having gone through 2 versions of the same tired plot, because by that point my patience was exhausted. I had hoped Garlemald would have been handled better. And then it wasn't.
I suppose that when the Scions go into the void and beat up whoever is in charge there that we will once again set up a provisional government of freedom-loving voidsents to rule over the 13th. The nations back on the source will then proceed to morph into the United States of Final Fantasy, with Hien spontaneously deciding to give up his crown and Dalmasca being forgotten about entirely.
You can get rid of tyranny in more creative ways than "yay democracy!" especially when it's been repeated this many times. The good guy taking the throne would be a near-unthinkable turn of events in FFXIV's world given that as of now, it has only happened once in the case of Doma. These other states are all becoming ideologically homogenous with the likes of Sharlayan, and it's making for bad worldbuilding. Each nation stripped of what made it unique and gritty in the first place, then pacified as the Scions bulldoze their way through.
When the writers keep using the same messaging and plot over and over again, what is this if not preaching? This along with the messy themes and "morals" of Endwalker being shoved down my throat makes for a very unpleasant experience and a world that is quickly losing the things that made it worthwhile to explore in the first place.
Combine this with sectors of the playerbase that look down on others for being fans of Garlemald or monarchies in general (along with being on the "wrong" side of the debate regarding the Venat and Ancients situation), decrying them as all sorts of things while they parade around with their borgor catboy plushie, it's exhausting my patience and despite my love for the game I feel extremely strained by everything going on. The pillars of story and gameplay are crumbling, all while the community is too busy fawning over Tweetingway.
Again, why are these people playing FFXIV and not Persona? Why are they ruining this video game world when they already have their high school AUs and other forms of media where they can have their own values preached back to them instead of forcing them into a fantasy video game setting?