I'm a Brit, this is my view of last two American elections. When Hillary lost when she was so far ahead in the polls, I was a little surprised, but, I don't have previous knowledge of past polls and elections. When Trump lost, again I was surprised because of the likes of Biden, plus, all the potential discrepancies raised.
I believe election integrity to be important, my impression is that the American Left are very laid back with voting security. Given Hillary's defeat, I thought they would have the opposite view.
I do believe the US Constitution allows one side or the other to query election outcome, which has happened in the past. I witnessed Trump exercise this Right and asked for a peaceful protest march to cheer on certain Senators and not others, voicing concern over voting practices/discrepancies.
And finally, I constantly witness Democrats on forums not know what the word, "Insurrection" means.
Democrats, you cannot use feelings as evidence, it doesn't work like that.