I actually gave Trump a hard look from March through mid-summer of '16, during his first campaign.
He was a non-politician Indie, and had a platform (originally) in support of universal healthcare. Two things I highly prized. Then, he attacked John McCain & his service to our country. Soon, he claimed an American judge of Mexican descent was not qualified to judge him. And finally, I saw him denigrate Gold Star parents.
I had seen enough. I could never vote for a man like this. I held my noise, and cast my vote for HRC.
As time went on during Trump's term in office, he continued to alienate & disgust me to the point I became a Democrat once again, which was the party I was born into but had left quite a few years before Trump's tenure. Throughout my life I had voted both Dem & Republican for the President, even while I was very active in local Dem politics! But I can no longer in good conscience vote Republican at this time. It's a shame, because I would like to play a part in reining-in the Dem Party if they get too far afield. As a country, I believe we grow & govern best through the middle. Consequently, I'm happy we now have a moderate sensible Dem - in the form of Biden - at the helm.