Obama did nothing impeachable. Unlike happened with most presidents, no one Obama appointed was indicted for anything.
And campaigning for the impeachment of Obama is absurd. That boat sailed long ago.
Had Obama not been banned from a third term, he would have easily defeated Trump. Hell, Hillary beat Trump in the popular vote, which is the usual way democracy works.
Obama's first term was quite good, His second was somewhat less good, but still pretty good.
Had he had a third term, it would have been worse than his second, but way, way better that the chaos, stupidity and ignorance of Trump's first term.
Trump is an egomaniac. His platform is all about (1) himself as being a Perfect President who makes perfect appointments and perfect phone calls, (2) Revenge on all that disagree with him about anything. (3) maintaning himself as some sort of Mega-Celebrity, perpetually deserving of constant worship and adulation.