It would be one thing if Ben put together such horrible teams that everyone predicted and expected them to finish in last place. That's not the case. Both years, the Red Sox were projected to be a contending team. Last year, they were projected to win the division. You can't fault Ben for the level of underperformance/injuries that both teams had.
If Price and Kimbrel absolutely stink this year, will that be Dombrowski's fault?
Lastly, I have always felt, and now my opinion is supported by "several baseball executives", that most of the "mistakes" that Ben made were the result of directives from higher up.