Extended-Phenotype Steve Clarke is failing too. So he joins Adkins and McDermott on the pile at the moment.
Like others have said, starting to wonder if the team has some fatal flaws that three (supposedly) decent managers could not overcome.
Although of course, SC still has time.
McDermott definitely failed but was, in hindsight, undermined by Zingaravich to a certain extent.
Adkins failed, but largely due to the total arse situation put together by Zingaravich. There's very little he could have done to address the squad level problems. Though he had a major weakness at defending.
Clarke is failing worse than Adkins, but is coming out from under the Zingaravich cloud, so should absolutely be able to fix the problems if he's any good. If he doesn't have a good summer, he's not going to last long.