Well, consensus seems to be that our numbers are pretty accurate. Looking at the number of excess deaths, that seems to be the case at least.
Other countries might underestimate their numbers slightly. Afaik, that would or could be the case in the Netherlands.
Still, that doesn't explain the massive differences.
During the first wave, we had massive problems in retirement homes, so that explains the high number of deaths back then. Our death toll in this second wave is still pretty high, but definitely a lot more "normal". Main problem right now is the fact that there are so many infections.
Numbers have been steadily decreasing the past few days, but like I mentioned earlier in this thread, at one point we had more than 20.000 a day. Taking our population into account, that would equate to more than 550.000 new daily cases in the USA.
I really don't know why our numbers are that much worse than everyone else's though. Sure, there's a lot of political incompetence, there's the population density, there are people who don't believe in the virus, etc. Some of the links Post Ironic posted a while ago give you somewhat of an idea.
But I'm not sure that explains everything.
Our healthcare in general is really good though. That has to be said as well.