The Mueller Report is opposition research on steroids. It is like an expanded edition of the “Steele dossier” – a collection of falsehoods and trivialities, assembled in a way to hurt the President as much as possible. And even this collection of falsehoods falls short of creating mere suspicion of “collusion”!
A one sided focus on someone’s imperfections and an endless repetition thereof might create the illusion that its target is horrible. If Mueller had focused on Trump using a bathroom, he could have easily filled in those 200+ pages (Volume I), and Trump would look even worse than in the actual report. Especially if Mueller had written that the investigation identified no similar activities by Hillary Clinton — the comparison it made regarding alleged “connections” between the IRA and the Trump campaign (the Mueller Report, p. 33).