I am starting to think you don't understand the meaning of inconsistency (a close cousin to plot hole). If either Garak or Kira vowed to kill Damar next time they met, and upon meeting him didn't try to kill him and it wasn't otherwise addressed, then yes that would be a inconsistency. But that is not what happened. Garak being a patriot and an effective spy and Kira being an effective military officer, each recognized that Damar was their best hope for rescuing Cardassia from the Dominion and saving the alpha quadrant, respectively, so they put off any thought of revenge to pursue the more important objectives. (There was even a whole discussion about the appropriateness and irony of Kira assisting her former oppressors in their liberation, so the writers certainly weren't oblivious to the inherent conflict of these "strange bedfellows".) If Damar had lived past the end of the war, I am sure one or the other would have tried to kill Damar (probably Garak). As presented, there was no inconsistency.
First of all, if you are tying to say that I was sarcastic and passive aggressive in my response, I was neither. I tried to straight up respond to your divergent responses/claims.
I will try once more: again, at no point was I claiming that the Dominion did anything to harm, hurt, or wipe out any of the military forces of either the Cardassians or the Romulans. Based on the Founder's dialog in "The Die is Cast" the Founders were primarily concerned with the intelligence agencies of those two enemy empires. They apparently did not feel that the governments and militaries alone were a significant threat. The 40 ships lost in the battle were produced, controlled, and staffed solely by intel agents (based on the total lack of knowledge of the operation of the Cardassian military). So, even if the military forces number in the millions for these powers, that has no relation to the number of intel agents killed. The intel services are in all likelihood much smaller in number and, at least for the Obsidian Order, have very limited military equipment (and by law the Obsidian Order should have none). A loss of 20-40,000 intel officers including some portion of their leadership (given Tain's presence in the fleet there probably were additional intel leaders present on other ships, and the assassinations that occurred prior to the attack) would severely hamper the effectiveness of those intel agencies. That was the Founder's plan, and that is what they executed. The Cardassians never posed a threat to them again. And the Romulans were sidestepped by a non-aggression pact until Sisko got them re-involved. Hopefully, these points are clear.