The ********* that is the Mueller report.
Collusion isn't a crime. Conspiracy is. The report does reveal that, in secret, members of Team Trump(Manafort certainly) working with Russians(Kiliminik) and trading information in an effort to influence midwest Democrat votes. That seems like a conspiracy to obtain the presidency to me.
Several outlined instances of Team Trump straight obstructing and influencing what witnesses will say.
https://www.justice.gov/storage/report.pdf
If Donald Trump were Joe the Plumber, he'd be drawn and quartered. Why isn't he?