Yes, there has always been a deep mistrust of any sort of court authority or law enforcement body when it comes to Trump; before, during, and after his presidency. Has the whole world always been against Trump? Or is he just, you know, kind of a criminal or a conman or something?
The primary reason the Attorney General and FBI are being pushed to disclose why the search was necessary is because of the deep mistrust of the FBI and DOJ when it comes to all things Trump - such as the Crossfire Hurricane and Mueller investigations.