Blake says the hunt for a 12th permanent manager in Tan’s 14-year reign is a “minefield”.
Former Wales international Blake added: “You’ve got to get to a point at some point where the owners and the chairman and CEO, they sit and look at themselves and ask the question ‘are we doing this right, is this the right way to go about things?’.
“But it won’t happen, there’s no sort of self-revision of anything or looking at anything they do, it’ll just be the same old, same old. Whoever takes the job is a brave person, that’s all I’d say.
“There’ll always be someone because someone always thinks they can turn it around, ‘I can do better, I can manage this situation’.
“But until you get in the situation that I think the last 12 or 13 managers have found themselves in, you realise it’s not as straightforward as it should be.
“You’ve not got the backing, you’re not making decisions, there’s no sort of philosophy at the club. It runs deep.”