Lol loved reading this thread. If you're mad that the AI's puny little fiefless terrorist organization won't stop raiding your empire then obviously they're doing something right. If they're annoying you and you want them to stop why would they pay you lol.
There are four massively unrealistic things happening.
The first is that due to randomly generated kingdom bank cheat money and tribute being paid from other factions (who they could never realistically threaten all at once), the AI gets a magical source of constant income which allows them to spam enough armies to be a credible threat. If they have no fiefs, a "
little terrorist organisation" in a time period without bombs should not be so disproportionately effective. They should only be able to field tiny parties that struggle to even raid a village successfully.
The second is that they will never make peace because they don't value their own lives at all, don't fear being executed to the last man, and have total and utter stupid confidence every time. This problem includes kingdoms that still do have fiefs. They should fear losing their last fiefs in a war. And if they do lose them all, in real life not every deposed monarchy became an instant insurgency ready and willing to fight to the death. Usually the ruler just fled into exile when they lost everything,
which is what Warband did.
The third is that *all* of my lords will unanimously vote as a hivemind, every time, on paying tribute. In real life some lords would not give a damn about someone else's fiefs getting raided and would vote no to giving up some of their income as tribute. Or, they would vote no because they thought they could beat the raiders (which ingame is very possible).
The fourth is that executing these actual criminals who are constantly raiding your fiefs and attacking your peasants will make you lose an enormous amount of relation with the international community. No such thing as a legal or justified execution apparently.