This is not just the case at TD, but it is quite frustrating when no one wants to accept responsibility. Neither the company nor employees benefit much from the blame game.
Instead of blaming the prior mgt, why don't the new people in managerial positions take responsibility and make some changes for the better? Otherwise, TD will go on a downward spiral.
(please forgive my mistakes)
I agree with your logic - exotically around what you tolerate. Do you think that mid level managers can effect positive change by not tolerating the blame game?
The reason why people usually blame others is that it's a quick escape from guilt. Blame is an incredibly easy and effortless tactic to use when people feel defensive.
Behavior drives culture. Culture drives results. You might expect performance, but in the end, you will get what you're willing to tolerate. The blame game is not only tolerated by the ELT they actively demonstrate this behavior compounding it further.
The fish rots from the head down.