Thing is this is how it should work:
Owner/board > DoF > HoR/manager
Owner and board tell the DoF the overall aims of the club and then leave it to the DoF to implement that strategy across the club. Including recruitment policy.
The manager and HoR, under the direction of the DoF, go about implementing a coaching/management style and then scouting and ultimately deciding on players.
I keep banging on about it but for me Thelwell's biggest failing was not having a HoR in place for the summer. He's trying to act like a DoF should, and that's good. But if you've not got that crucial position filled then you're making a rod for your own back.
Apparently the job has been accepted by the candidate they wanted, yet that happened 10 months into his time as DoF and it still hasn't officially been announced, as the person hasn't yet started. So as it stands, Thelwell has to take the brunt for recruitment. Lampard can take his blame for insisting he prefers English players/PL experience and Thelwell can take the blame for not being able to come up with better than he did.