as far as whether he should have taken the deal or not, i suspect the ownership weighed in on that. no way did they not have an opinion and no way did they allow him to act actively against their interests. i imagine he did their bidding and now they shitcanned him to bring in another set of eyes to oversee the trades talks and pending explosion of the roster. not exactly fair for him but then again he's been there for AD's whole career and they have done little of note. some shit breaks for him for sure (most guys getting hurt) but other things just didn't go well. Plus the foremost bad break (Cousins injury) didn't end up costing them that season, and then they kind of bungled the negotiations afterward. So in isolation I think Demps is being treated unfairly but in the picture it's not relevant and he had his chances over a long time.
And you will know MY JACKET IS GOLD when I lay my vengeance upon thee.