As for the obstruction aspect - isn't that now a mere technicality? A man and his team have been falsely accused, he tried to get out of the burden of being politically undermined by the drama of an investigation that would clear him in the end, which it did, but not without massive damage to his political capital, which it did. I am sure other governments were also following this closely, and it most certainly would have had an effect on foreign relations.
That sounds exactly like what any innocent person would do. If the government in my country shows up at my door tomorrow with some incorrect charges, my first reaction is to get rid of the investigation by whatever means necessary because I don't want to go through the nightmarish ordeal.
What's being argued is that he tried to fire the guy who would end up proving he was innocent? Is that the level of partisanship that your country has reached today? It's really not helpful to any society when things get that bad. It's the same "get him by any means necessary" attitude that I referenced in my earlier comment. We couldn't get him on the original accusation so now let's get him on how he reacted when we accused him.
You are literally arguing that if you feel you are innocent, you are able to obstruct an investigation because you know you are innocent. That is not how justice works and is circular logic that empowers officials to cover up their own misdeeds. Obstruction is a crime in itself because it prevents an investigation from proceeding and shows a guilty conscience.
This is what I am referring to in my original comment about the quality of journalism and its motivations - it's an endless chase, and to be honest he's right to call it a witch hunt against him specifically.
And even worse you start to see people taking advantage of these human weaknesses. Politicians are perhaps the worst offenders but it is also common in advertising, business and even personal relationships. Somewhat depressing.
Trying to make the case for a rational, objective reading of the Mueller Report is futile while the news media, social media and most people you meet are spewing unfounded innuendo (see OP for example) and outright disproven conspiracy theories.