The issue on both sides is neither will even entertain the opinion of the other. The division is literally tangible and few, if any, appear willing or able to have a reasonable debate.
My opinion of Trump is that he is unmeasured in his actions and words. He is brash, crass and highly unconventional in the role as president and is certainly no politician. He wants every deal to be in his favour and he wants everyone to know how great he is. This obviously attracts a lot of loyal followers however such a polarizing figure also attracts a lot of detractors. It seems you either love him or hate him, there appears to be no middle ground which is where he fails as a diplomat. In order to secure 4 more years all he had to do was some diplomacy and appeal to those voters out there who were waiting to be swayed. That is not who he is and he did not get the votes he needed.
Now, before you all go screaming conspiracy theories, voter fraud and stolen election I am willing to discuss credible evidence of actual fraud however I do not work for Disney and am not interested in fantasies. On the issue of voter fraud, in particular mail in ballots, Trump flagged this as an issue for months before the election. He was putting in place the thought that somehow this was an avenue for the election to be stolen from him. My view is he knew that Biden supporters were much more likely to use postal voting than Trump supporters as they (Biden supporters) had a much more cautious outlook when it came to Coronavirus and would choose to avoid going to polling stations in person. That meant that if he could cast doubt on the validity of those votes he would have an avenue of challenge.
My views may very well differ from yours.