It was former Labour home secretary John Reid who is best known for describing the Home Office as "not fit for purpose" in 2006 although he later said he had been quoting a senior civil servant.
Under successive Home secretaries of both major parties, male and female genders, and different ethnic origins it has remained a problem department.
I do not condone bullying but this is clearly a very difficult department to run. The only ministers who have even survived as Home Secretary for any length of time, never mind been seen as successful, have either been extremely tough individuals, or had sidekicks who made Dominic Cummings look like Andy Pandy, or both.
There is a thought provoking piece on "The Article" site by Daniel Johnson on the subject here.