My dislike of D. Trump predates even his attack of Obama's lack of birth certificate. He has fought environmental efforts in NYS and NYC since before I was born. He has fought Bloomberg, who is a hero of mine. When Obama was running against McCain, I was a conservative, because everyone around me was, and I had not yet started my personal journey towards Liberalism, Federalism and whatever other political ideas I now have. (I also know my journey is not yet over, but this is where I stand now.) Even then, I was disgusted by this brash person who thought he was richer than he was, attacking the President over foolishness so openly. I must also admit that some of it is racist - he is white, blond, blue eyed has a German name and German ancestry - not something to endear him to me. Furthermore, his-far-from dignified manner of speech and way of conducting himself makes him go towards the bottom of the list of people I want representing me, or America.
However, his presidency reminds me greatly of one of my favorite presidents - TR. He has shown himself to be competent with Israel, Korea and China. I don't understand what he gained in his Iran deal, and wish he would preserve NAFTA (maybe modify it, but preserve it), and wish he would be more environmentally conscious, but I must admit that he seems to be doing a good job. I do not think Hillary Clinton (who I voted for) could do a good job, but who knows? I must say that I hoped (and expected) Clinton to win NY, but Trump to win the election. (That is what happened)
So I dislike Trump personally, I dislike the States' Rights, isolationism, environmental carelessness, in-fighting and reactionism he has come to stand for, I dislike the way he talks, his lack of dignity.... I couldn't vote for him. However, I must admit that he seems to be doing a good job, and that it is likely that he will go down as a really good president who did a lot of good.
Am I wrong? Maybe. But these are my feelings, if it helps you understand.