I don’t want to be alarmist, but could there be more to this than just settling scores? These organizations are intensely hierarchical. By installing folks loyal to him rather than the Constitution, could Trump be setting himself up to control the means of his forcible removal?
Normally I would not think this possible, but my right wing “friends” are becoming increasingly deranged and are convinced that they must “save” America from the Communists. So many deluded folks makes me wonder if he really could get military, the justice department and intelligence community to fall in line with a coup if he can get the right leaders in place.