They did exonerate the president for collusion collaboration, conspiracy or whatever word one wants to use in the Russian probe.
It wasn't an investigation specifically into the President. It was an investigation on whether the Russians interfered in the USA election, and they did find that this happened. This is the biggest take home from the investigation and should spark much concern and people should be demanding that Russia be punished and that USA should put measures in place to address this in future.
BTW, Trump still publicly denies that Russia interfered. So, hence, he is not doing anything about it.
The Report did exonerate everyone in the Trump campaign, in that he had insufficient evidence to push forward with criminal convictions. However, many interactions with the Trump Campaign and the Russians have been documented. These were concerning interactions and were worthy of investigation.
You don't start an investigation knowing that the outcome will be criminal charges.
They found nothing regarding him or his people on that account.
They found lots of incidents and interactions worthy of investigating, just not enough to bring criminal charges for conspiracy against anyone involved in the Trump campaign.
e.g.
The Trump tower meeting between Donald Trump Jr and the Russians (which was initially covered up, hidden, and lied about).
Paul Manafort sharing polling data with the Russians.
etc
Mueller did list 5 things regarding obstruction. But fell short of accusing him of such.
Mueller did not fall short of accusing the president of crimes. The special council were never going to accuse or charge the president of crimes even if the President did clearly commit crimes.
And no one has filed charges against Trump for it either. Therefore Trump is INNOCENT.
Trump is to be treated as if he is innocent, yes.
They can't find Trump guilty if a crime, but he sure could have accused him of one. They didn't.
Mueller stated the reason why he wouldn't have accused the president of a crime. This reason has nothing to do with the evidence found or presented. Nothing to do with whether the President actually committed crimes or not.
Therefore this is a moot point. Noone is suggesting that Mueller or the Special Council has accused the president of a crime.
You might as well keep going on about how the latest version of the Edmond's cook book hasn't accused Trump of criminal wrong doing. As if this would be some interesting point of significance??