I'm not inclined to try to make people believe anything. I do believe, and I'm very inclined to point out, that the criticism is coming from hindsight. It's labeled a novel virus because that's what it is, novel.
@planomateo mentions the travel ban which was instituted after the first positive case was discovered stateside: January 31st as I recall. The notion it should have been instituted earlier sounds good when you hear it but completely dismisses the fact that the WHO said it wasn't a virus that could travel from human to human two weeks prior. Now, that was China's propaganda but it was also put out as fact by WHO.
What makes a lot of the deserved criticism belong on WHO is Taiwan's officials were telling WHO China was lying about the virus: WHO chose to ignore what those doctors were saying.
But in spite of all the disinformation and blatant lies about the virus somehow, someway, the administration should have acted more quickly on something they were being lied to about and something no one, worldwide, had experience fighting?
The CDC's test failed but that should have been expected? Take the recently removed regulations on 3M for masks. Do you honestly believe that would have been done pre-virus? That took a few days but that's how the government works—and that doesn't fall on one individual, or one administration.