I mentioned this in the discord so I figured that I say in the thread. I think one mistake that some posters are making is viewing this conflict in terms of Urth vs the Arthwyd (an individual vs a civ) rather than the Caradysh vs the Arthwyd (a civ vs a civ). Urth is an immortal control freak ruler who is individually powerful, but they can't single handedly take on a major civ like the Arthwyd and just destroy them. Most of Urth's power and danger comes from the Caradysh as the civ Urth rules provides them with infrastructure, manpower, resources and other things needed to match a civ that a single individual cannot acquire on their own.
Urth is a nice, obvious figure to demonise and blame things on, but if he wasn't the ruler of a civ, he wouldn't be more than a minor threat to the Arthwyd and one that could easily be kept contained. Urth is dangerous, but to be dangerous to a civ like that Arthwyd as they currently are? Urth needs the resources of a civ to do that. That is why this conflict isn't Urth vs Arthwyd, but Caradysh vs Arthwyd. I'll admit that part of this is because the Arthwyd are seeing Urth primarily and the Caradysh as an add-on to him, but I hoped that more of the players would have figure this out by now. Another part is that Urth is one of those rulers that views the state as an extension of themselves that exists to serve them and carry out their whims.
To eliminate Urth as a serious threat, you need to deal with the Caradysh civ and isn't easy to just defeat a rival civ of comparable size.
Another thing I am seeing is that some players are overestimating the impact and power of the dice and not just in how some people are annoyed by how the crits against Urth first time around didn't finish him off for good. A dice roll is used to simulate random chance and is limited by what can be done by what the dice roll is rolling for. If you crit a dice roll, you do really well for what you can do on that dice roll. It is entirely possible to crit-succeed a dice roll and still lose because of other factors which render victory impossible for you. You can roll higher than your opponent and still lose if you are at significantly large enough disadvantage.
Furthermore, not all crits are equal. One crit on dice roll A can be significantly more impactful and the crit on dice roll B because of what each dice roll is for. Even if you crit on a dice, it is still limited by the dice roll is for and getting a crit isn't going to make the results expand beyond what the dice roll allows for. For example, Evalyn got a crit to physically kill Urth. Combined Urth's own physicals and Arthryn metaphysically wrecking the Tree Spirits, Evalyn utterly crushed Urth personally even through the Caradysh army was defeating the Arthwyd one. Beyond that killing Urth's physical body with ease, Evalyn's crit did nothing else. The Caradysh army retreated despite it was currently winning because it was dependant on Urth due to Urth being a paranoid control freak. Urth revived themselves despite the crit because the crit did nothing to stop him from meeting the conditions to revive himself. Arthryn utterly wrecked the Tree Spirits, but that had no impact on Urth reviving themselves and actually made it easier for him to do so.
A crit is nice and is desirable, but the players would be wise not to place too much important on getting a good result on a dice roll or two. Doing so will just lead to disappointment and frustration.