That's because his ego is so big that he refuses to put it aside and thinks he can do whatever. I don't agree with everything he has done or said, so much of this is his ego running wild. I'm pretty sure that's why he ran for President to begin with, to stroke his own ego. At the end of the day, he is the President of the United States and as soon the Democrats went full on supporting Joe Biden, they ensured his re-election come November.
Only thing I know is the World Health Organization and China were working together to spread misinformation about the virus and covered up how deadly it truly was. WHO said on January 14th in a tweet that according to Chinese Authorities, the virus can not spread through human to human contact. On Jan 22nd, they tweeted out that there was evidence of this virus spreading through human contact, but I thought it didn't? On January 23rd, WHO tweeted that it was too soon to declare a public health emergency of international concern. Only for WHO to then declare days later, it WAS a public health emergency of international concern.
When Trump initiated the Travel Ban on the 31st of January he was called racist for doing so. So either he doesn't put the Travel Ban in at all and he gets bashed by for not doing anything sooner, or he puts the travel ban in and gets called racist by the same people. Trump loses no matter the situation.