What's your point about my point? So Lindsay Graham said nice things about a former fellow senator Joe Biden. What's that got to do with the Senate investigating the Bidens for corruption to prove Trump was right in calling for an investigation in Ukraine?
Regarding blaming Obama, the Russians meddled in our 2016 presidential election that you said Trump colluded with them which was proven false by Mueller. However, it still is true that Obama was president while the Russians meddled and did nothing to stop it. He apparently was too busy tapping Trump's telephone.
I don't remember ever saying Trump colluded. He may have benefited from it, but you can't hold that against him. The most I would say is that making wisecracks about getting the Russians to hack into stuff on his behalf is stupid, but that's par for the course, the guy's a rube. But hey, he's your rube.

Your persistence in placing blame for the Russian interference is beside the point. Social media networks have weaknesses and people exploit them. That problem will solve itself in the long run, no one will pay attention to it if it's toxic, just takes a while for everyone to catch on. To my mind, social media is already a lot like those tabloids in supermarkets. Signs are emerging that Twitter is becoming a place where sex workers hang out, now that "back page" is gone. In time, people will realize how foolish it is to be conducting public policy discussions on social media. The rise of long-form documentary podcasts seems to be a rebellion against it. Trying to fix complex problems requires time and work and exchange of ideas, not something for which Twitter/Facebook/etc. are well-suited.
As for Trump and the impeachment, the denials and excuses I keep reading all sound a little lame to me. My guess is that people instinctively know this. True leaders don't behave the way he does. He has surrounded himself with incompetent yes men and has had a lot of trouble hanging on to even them, and I doubt anyone competent wants to work for him. That's not good for your country. Luckily, the day to day lives of most people are not directly tied to what the President says on Twitter. Decisions at that level are more strategic in nature, so their effects will be felt later.