Early in the outbreak, Trump was being told by medical experts, such as Dr. Fauci, that it was really nothing to worry about. If Senator Cotton hadn't scared Trump into restricting travel from China we would be in deeper excrement than we are even now.
I am not trying to make light of the situation, or your post. But every president is surrounded by "advisors". Sometimes the advice is good, other times, not so good.
The time between "early in the outbreak" and a few days ago was at least 3 months.
"What he did was better than nothing" is hardly a ringing endorsement.