There is a current consensus as of May 2021 of the established media that Trump was in complete denial about the 2020 US election.
However, the same media had been in complete denial of Trump’s election of 2016
New York Times wrote in December 2016:
Russia and the U.S. Election: What We Know and Don’t Know
Russian Hacking and Influence in the U.S. election
3 years after the election Time Magazine continued denying the fairness of the 2016 election:
US media is still in denial about 2016 but yet complains about Trump’s behaviour.