I live in Canada, and waited more than a year for a specialist. It took me 2 years to find a family doctor with decent reviews who was accepting patients . I needed an MRI once and the wait was measured in months. I waited four months for just a cortisone shot, before the pandemic.
I'm not claiming one system is better than another. Certainly if you're wealthy and have good benefits in the US, the standard of care is much much higher.
On the flipside, if you need cancer care in Canada you're probably not going to need to declare bankruptcy.