Trump won the election, according to US laws on presidential,elections, and it's not the first time that the system has retuned a president who did not have the majority vote.
I don't recall a huge movement to change the presidential electoral system when Gore lost, or riots, or whatever.
This boils down to a tantrum rooted in dislike of the totally properly elected president. And if there is to be any respect for a voting democracy, then the result it returns has to be respected too.