If your boss said it really want this deal, the company I used to belong to want it and I want to stick it to them, i would personally say something along the lines of ‘there are way better deals out there, but I can understand your perspective - and it’s not a bad deal, just there are far better deals out there’. You’d do the deal, right? It’s not something you fundamentally disagree with, but you don’t think it’s the prime deal out there.
This exact thing has happened to me at work. It’s not a bad deal, it’s just a middle of the road deal that the boss is really keen to do to deprive the competition of.
It’s all hypothetical obviously, but this scenario is something that I’m at ease with for explaining the whole Zaha thing this summer.