Contempt for women is not a personality trait. Pathological lying is not a personality trait. Willingness to amplify divisive and racist rhetoric is not a personality trait. Waffling for days before condemning white nationalism, weeks on accepting the results of the democratic process -- rooted in rotten character.
I think these issues extend to his policy positions. The US has not honored international commitments, abandoned allies, and failed to stand up to human rights injustices because of a lack of integrity in our highest elected official. This is not the only presidency where this has been an issue, but it's certainly the most shameless one.
https://www.politifact.com/factchecks/2020/mar/02/donald-tru...
https://www.nytimes.com/2020/10/20/us/trump-taxes-china.html
https://www.politico.com/news/2020/04/24/trump-biden-china-d...
This sure sounds like selling out to me.
Edit: Remove sarcastic sounding text.
Edit 2: Remove more sarcastic sounding text and add more sources.