Lack of planning for players like Welbeck and Ramsey, sure. But the rest are what they are.
Who have we sold that we look like we got seriously screwed on? Most of them went on to do fuck all. Our players are not in demand and are largely undesirable due to age, injuries, performances and high wages, that's the simple truth of the matter.
There's no magic negotiating trick that Gazidis missed in the negotiation seminar that gets people to shell out shitloads for shit players.