You do realize that the report is going to be made public don't you? If Barr is lying or trying to cover something up it will be exposed.
For someone who thinks they're so smart you sure do easily believe every single wacky conspiracy pushed about Trump. I mean you're literally still trying to defend collusion and obstruction. I'd call that dumb.
If it doesn't get made public, it will most assuredly be leaked by somebody, just like everything else.