We certainly have a strange system of governance, but then again it's what we have for now. One logistical hurdle is just the sheer magnitude of our country. Sure, we're not the most populous country in the world, but 330+ million people is still a heck of a lot of people.
For the most part I'm ok with the vaccine rollout. The most frustrating thing for me is the waiting, but I know my turn will eventually come.