Apples and oranges, Hillary made a concession speech and Obama invited Trump into the Whitehouse for a gracious transition of power. They did what they needed to do to formally respect the vote of the people our electoral process . Trump, the ass, did not do any of that. You know that.
I have no problem with liberals complaining that Trump wasn't president for everyone. I would have no problems with conservatives complaining about Biden not being president to all (they would be wrong of course). I have no problem with anyone thinking unfair tactics and lies (but not widespread purposeful vote count cheating) were used to get elected.
I also think Trump was pretty clear during the last 4 years that he was mostly the president for his supporters, not for everyone. He was a divider.
I know you know all of this. Its ok for you to admit Trump has lied and damaged the confidence in our electoral system. I find the social psychology factors of the Republican leadership and of course cult members to be so steadfast in their denial of reality, disappointing, but also to be quite fascinating.