That's simply your opinion. You're obsessed with the evils of supplements. Who cares if you need a couple of supplements to make up for some known shortfalls? It's a trivial part of my day, and it's hardly a "handful of supplements". Besides, consuming animal products has its own set of drawbacks.
I'm not sure why the vegans you know are so concerned about iron and zinc. I'm deficient in neither and don't go out of my way to supplement them. They're readily available in many plant foods. I'm also well aware that vitamin D is produced in skin, but you might want to double check your latitude if you're relying on that in the winter.
My goal is not to get 100% of my dietary requirements from food. That's apparently your objective. I never claimed a vegan diet can provide all the nutrients you need without supplementation. I readily admit you have to take B12. Some other things might be good to supplement too, depending on the actual make up of your diet. This is true even if you are omnivorous.
This whole thread started because you made this claim: "Non-animal sourced diets are hopelessly unhealthy in the long term no matter how many supplements you take to try and take to make up for it"
And now you've added:
"Vegans are among the only otherwise healthy population group in the developed world that routinely suffers from illnesses seen only in the most decrepit poverty stricken parts of the undeveloped world."
Please cite something specific to support either of those claims. "Google it" is not a citation. I know a lot of long term vegans (multiple decades; some lifelong) who are doing just fine.
If anyone else is still following this thread, this is a good source of information for vegans who want to be healthy: http://veganhealth.org