The main differences between the countries which could have frustrated your friend could be:
- Switzerland got their doses later than the US for a variety of reasons, so the US was able to give them away earlier, and lift the age restrictions earlier
- Switzerland made clear groups to assign priorities, with which you friend might not have been happy (presumably because he is in the last group, as I am)
That would explain why in his personal situation he was better off getting the vaccine in the US while on vacation there, but that's not really a case of too many rules or red tape holding the vaccination back in Zurich.
- Switzerland got their doses later than the US for a variety of reasons, so the US was able to give them away earlier, and lift the age restrictions earlier
- Switzerland made clear groups to assign priorities, with which you friend might not have been happy (presumably because he is in the last group, as I am)
That would explain why in his personal situation he was better off getting the vaccine in the US while on vacation there, but that's not really a case of too many rules or red tape holding the vaccination back in Zurich.