You're relying on Barr's account of what Mueller said. But, since
Barr lied to congress, can anything Barr says be trusted? We can only trust what Mueller actually said.
The claim that the US AG lied under oath before Congress is a lie, one meant to discredit him before he and his DOJ can release their investigation findings against exposed Democrat crimes. If Democrats SERIOUSLY believed Barr perjured himself - and could prove it - they would have taken action to charge him with perjury and have him removed as US AG. Instead their momentary accusation was like a
fart in the wind - almost immediately after it was released it evaporated and no more serious effort to prove it or act on it was made.
Unlike Mueller, Barr has never hidden evidence to send 4 innocent men to prison for over a decade, has never hidden Russian crimes, never oversaw FISA Court abuses until having to answer for them after the abuses were discovered, never accepted money from millionaire Russian oligarchs to run an operation, etc...
Unlike Mueller, Barr HAS testified under oath before Congress...voluntarily...and answered their questions freely.
But nice attempt to spin, trying to flip reality where you somehow argue Mueller's history in any way shows he has been an 'innocent' 'straight-arrow'...