If that's the 'strength' of your argument then you have no idea whether someone has won any election or not regardless of party or candidate. Otherwise, I certainly do have an 'idea' as to who won the last election and it assuredly wasn't Trump. Powell and Giuliani can be dismissed easily enough as neither had anything to bring apart from bluster and false allegations. That's why they're facing lawsuits. There's been ample opportunity for Trump's lawyers to president evidence of any fraud in court and yet lo and behold, they back off once there. Why? Well, it's one thing to shout 'fraud' outside of such a place, it's another to perjure yourself while in there.
Even Fox News and Newsmax backed away from voter machine fraud allegations once legal action was threatened. If there was substance to them then why do that?
As to your last then the majority of the American people got what they wanted, Trump out of office and Biden in.