You're getting this backwards. The legal means are not there to fight the outcome of the election, they are there to make sure every vote is counted properly. This is a subtle but important difference: nobody denies that there may be minor and insignificant improprieties in this election, as there are whenever a country of 300 million people votes. What is being denied is that there was whole-scale interference with the election system. I'm fairly confident that they will not be able to convince a court that there was, but that doesn't make it ok that they are filing lawsuits on no evidence. People being upset about an election outcome is no reason to ignore the reality of this situation.
I agree and so do the courts which is why this problem will likely solve itself if you just let it play out.
The kind of pacification you call about is not something Trump or republican party awarded to anyone last 4 years. They enjoyed to trigger libtards. There was no patience I could detect.
What you suggest does not work, because it demands one side to follow norms that other side does not have to follow.
There will be some on the right that will never be convinced that this election was legitimate, but this pacifies the more reasonable people on the right. Trying to kick the Republicans while they are down , chastising them them for using legal means to fight the outcome of the election, or engaging in grievance politics just further reinforces the perception that the left isn't operating in good faith.
Remember once all of this is over we still have to live with these people.