The US has shown a general lack of care for it's citizens health. I honestly wouldn't be shocked of this was just a way for biogen to have a massive spike in their stock so it's holders can cash out.
The American health system has its problems. But this is an odd accusation to level against the country that played a foundational role in developing, distributing and administering highly-effective and novel Covid vaccines to a world-leading fraction of its population.
These systems have strengths and weaknesses. Broad measures of "good" or "bad" are too lossy.