Look. I get it. When you like someone, you want them to be the noble hero. (Why do we do that? Many reasons, but the biggest being ego. Our mind knows that if we choose the wrong hero, we fear losing tribal standing for poor judgment. So even when we are wrong, we’ll fight and even kill just to preserve our ego**. This is funny, because it takes the exact opposite action to gain trust; it’s just that our intuition doesn’t serve us well here.)
So, while history isn’t done (and leaders that succeed him may well progressively worsen making him the last greatest president we have had in our lifetime) , the evidence right now is clear. I know it hurts those who need him to be a hero for EVERYBODY (and who feel this weird obsession with throwing themselves in front of valid criticism), the reality is is that a human made very human mistakes, primarily due to his arrogance but others can argue evil or otherwise. When ego drives your decision making, there can only be one outcome. Invariably.
If he is your hero, icon, role model and/or messiah, you will interpret an attack on him as an attack on yourself. (In the same way that religious people get angry when you attack a popular figurehead or some avatar of a deity.) We personalize the tribal and it’s what makes tribalism so successful, and so terribly, terribly ugly. People who idolize him need to do better at selecting heroes; other people are under no obligation to avoid criticizing him just because it gets his fans triggered.