I think you've totally missed my point tbh.
It's got nothing to do with personality of the person it's the ex player being given a leap into management without any management experience.
There's plenty of evidence of it I.e. Rooney, Lampard and Gerrard.
Some ex players are willing to take time to graft and learn like Alonso, Xavi etc... at under 21s or youth coach level.
Most of the above english managers haven't been able to turn around bad patches of form as a manager.