No, just no politician on either side should say they will accept the election results no matter what happens. What is wrong with saying "I will accept the results if there is no good evidence of fraud that could change the outcome. The fact is no election is without fraud, it is just a matter of is it enough to change the results.
Then you don't, in fact, have faith in your institutions. You think that elections can be stolen, and want proof they were not before you'll accept the results. That means that you suppose that Americans are, in general, corrupt. How sad for you. But of course, you've already said as much about the judicial system in some of your comments about Trump's trials.
Also, Have you talked to Hillary Clinton on this matter as well? or Al Gore on this matter? Or the news media in 2016? All claimed the election was stolen. Were they ending faith in our institutions by claiming these things or is it only when republicans say these things?
The fact is that Hillary Clinton won 48.18% of the popular vote to Trump's 46.09, lost 5 "faithless electors," and an investigation by special counsel Robert S. Mueller III concluded that the Russian government interfered in the 2016 election “in sweeping and systematic fashion” with the goal of helping Trump and harming Clinton. The media did report on that, because it was news, and that's their job. But Mueller could not find proof that the interference actually changed the results. That is a much harder thing to prove. And by the way, I rather suspect the endless chanting -- goaded on by Trump -- of "lock her up" most definitely had an adverse effect on her campaign.
Now, if you are saying that in fact the 2016 election was stolen because that's what "the news media," then that means you do NOT consider Trump to be a legitimate President -- it means he walked away with stolen goods.
As to Al Gore, the 2000 election was actually "awarded" to Bush by 537 when the Supreme Court
stopped a recount that had been initiated by a ruling of the Florida Supreme Court. In other words, SCOTUS interefered in a valid recount.