True, as I said initially, given what you presented I would not hold him responsible for that delay.
Here is how you yourself outlined the way in which he is in fact responsible for the delayed and bungled testing:
"2. I'm not even sure how to word this one so I'll be blunt - complete and ongoing bungling in delegating, assigning qualified people, retaining qualified people, and heeding the advice of qualified people when it comes to addressing this crisis. Multiple changes in leadership of multiple and competing (and often not communicating) groups attempting to work on this has created a morass of conflicts and inaction. Not listening to, and in fact outright contradicting the public advice of his chosen experts has led to public confusion and contradictory policies. This is not unique to this situation - it's reflective of Trump's overall approach to organization in his Administration, but in this particular case the repercussions become obvious and can cost lives. This is a situation where having a "bureaucracy" is beneficial - having people who know how the system works, what strings to pull, and who to go to is important. And speaking with ONE voice is critical. We have an undisciplined president publicly contradicting his own experts - that does not lead to confidence this crisis is being well handled."
For if you hire unqualified goofs, loyalists, all speaking over the other pursuing vastly different aims, no good result will be achieved. Trump is not the head of the CDC, tasked with overseeing the development of tests. He is tasked with assembling teams that coordinate well, and have the qualifications and skills to get the job done.
And this is how a competent administration, headed by one who actually cares for the job and how it impacts others, works on that matter:
Though the H1N1 virus had begun spreading in Mexico, the first case in the United States was detected on April 15, 2009, in a 10-year-old patient in California. Two days later, CDC laboratory testing confirmed a second infection in an 8-year-old also living in California. Within one week, the CDC had activated its Emergency Operations Center to respond to what it had identified as an emerging public health threat.
Before the end of April, the government had declared a public health emergency and started releasing medical supplies and drugs from the CDC’s Strategic National Stockpile. “The real-time PCR test developed by CDC was cleared for use by diagnostic laboratories by FDA under an Emergency Use Authorization (EUA) on April 28, 2009, less than two weeks after identification of the new pandemic virus,” the CDC notes on its website.
Two weeks. That's how to get ahead of a pandemic, how to jump-start pervasive testing, and get ahead with the development with both educating the public and the development of medication / vaccines.
Trump, meanwhile, was out campaigning, was fighting twitter wars, almost got into a real war with Iran, and also did not forget to fire people who crossed him during the impeachment he brought upon himself.
Because Trump, as we got to learn, cares about the "big stuff" - like his reelection.