I'll be generous and assume that you simply misunderstand me. I agree, it's not a competition, nor should it be. However, when someone starts engaging with you

I'll be generous and assume that you simply misunderstand me. I agree, it's not a competition, nor should it be. However, when someone starts engaging with you and then decides they are disadvantaged, and bows out with "agree to disagree" it's very passive agressively re-framing an attack as a truce. I'm sorry no. I don't "Agree" to disagree with you. You decided to disagree with me - which is fine, but own it. I don't get forced to agree that we just have different opinions that are both OK. I think you are wrong and I don't agree to anything short of that. Passive aggressive behavior like this is worse than the disagreement in the first place! You can disagree - that's fine, I'd love it if you heard my thoughts, that's great. I'm engaging to try to convince and reach consensus. But shut me down with "agree to disagree" (with dismissive waving hand), nope - not OK.