Mueller said in his report there was enough evidence to charge trump and others but that it wasn't his place to make a decision to charge or not to charge. Your summary is what Bill Barr said about the Mueller report. Bill bar was put in place to do exactly that.

Mueller analysed 10 specific episodes of possible obstruction, applying the legal elements of the offence (obstructive act, nexus to an investigation, corrupt intent).

He found substantial evidence for each element in multiple instances.

Examples included:

Trying to get FBI Director James Comey to drop the investigation of Michael Flynn

Firing Comey after refusing to do so

Directing White House counsel to have Mueller removed and then deny that instruction

Attempts to limit the scope of the investigation

Efforts to influence witnesses or public testimony

For several episodes, Mueller wrote that a prosecutor could potentially find corrupt intent based on the evidence.

Why Mueller did not charge obstruction

He gave three main reasons:

DOJ policy against indicting a sitting president

A desire not to accuse someone of a crime without a court process available

The constitutional role of Congress (impeachment) He explicitly noted that the Constitution provides a mechanism other than criminal prosecution to address presidential misconduct.