So, my Kings have since ancient times had this Realm Duress tag which I so despise. What I want to know is if there's a way to lose the tag, or if you're stuck with it for all eternity? It hurts like hell to see my vassals dropping one after another, and I just want it to end and I don't want to enter the savegame and modify it... feels like such a cheat (obviously)...
Is there an event of some sort which removes it? Or does it remove itself after a while?
it removes itself once you get your vassals under control.
one way to do this is just to let some of the more rebellious, and distant, ones go. sign peace treaties recognizing their claims. who cares if they are the count of where-ever-in-sweden? you have more important things to worry about.
when i get realm duress, i take it as a sign that i need to focus on my priorities - where my core demesne and lands are. everything else becomes expendable.
eventually, the situation will/should resolve itself. the key danger is not internally - you can survive realm duress regarding your vassals in most instances - but externally. should the seljuks or the french or whoever decide that they want to knock you down a few notches, without reliable vassal armies, it's hard to fight them. again, this is why i focus on my core, and let the periphery go where it may.