Andrew C. McCarthy explains what should be obvious: Mueller's complaints about "context" are pointless now that his report is public.
Mueller was annoyed because Barr's report showed Mueller didn't do the job he was retained to do, and omitted all the narrative-writing that Mueller preferred to do.Before Attorney General Barr issued his letter outlining the special counsel's conclusions, Mueller was invited to review it for accuracy. Mueller declined. After Barr explained that Mueller had not decided the obstruction question, the press reported on this dereliction. Mueller is miffed about the press coverage ... but he can't say Barr misrepresented his findings.
Like the Mueller investigation, this episode is designed to fuel a political narrative. But we don't need a narrative - we don't even need anyone to explain the report plainly. That's because we now have the report. We can read it for ourselves. The rest is noise.
If you don't like Barr's summary then ignore it and go read Mueller's report for yourself.