You sound quite partisan to be honest, but I'll give you the benefit of the doubt. It is true that Trump's (or anyone's) opponents are allowed to be outraged over serious things. But you literally just pointed out at the left also got outraged by trivial things:

> The one where he was very proud that he could identify an elephant annnnd that proved he was a very stable genius?

Trump boasted about a quiz, who cares? It's not important. But it was in the news cycle.

Honestly, I think the left really despited the way Trump talked and phased things more than anything else. If he spoke more mellifluously like Obama, but did even more drone strikes in Yemon, CNN wouldn't go after him as much. Another example is "China virus". You know, like MERS (Middle East Respatory Syndrome), Spanish Flu, Japense encephalitis, German Measels, Zika, Ebola, etc.? All named after where they came from. He only called it the Chinese virus in response to a question from a reporter who said that the Chinese government claimed the US government made it in a lab. But of course, Trump must have said it because he's a racist and wants to blame Chinese Americans. It's just so silly and manufactured outrage.

I can think of a few other examples of overblown outraged just off the top of my head. I think the media just generally cried wolf a lot. Every time Trump sneezed it was a scandal. So then people either tuned out entirely, or got outraged by Trump every day. And thus here we are with are divided country.