The most prohibitive factor to getting players out the door is the wages they are on.
Bolasie 70k p/w, Schneiderin 120k p/w, Sandro 120k p/w............the list goes on.
Players who have no long term future at the club but are on massive contracts. Handed to them by a previous manage and/or DoF. There's not many teams in World Football who can pay those types of wages. Certainly not pay those wages on players who haven't fulfilled their potential or wh are a long way from their peak years.
Pinning this on Brands is nonsense in my opinion. Trying to judge a DoF after 1 transfer window is nonsense. Let's see how's he done in 2 or 3 years time. That's the type of time frame, if things go well, that he'll need to help turn thing around.