Damn, should have previewed...
Here's what you're failing to grasp
The more market share that Linux has, the more support that they should see ...
This is only true if people make choices differently based on Linux support. But you are refusing to do that.
You refuse the suggestions of the quickest most effective way to solve a basic incompatibility problem: use different hardware.
You made the choice to buy an ATI card. YOU, PERSONALLY, made that choice. It's lack of compatibility is YOUR PROBLEM. You clearly made the choice to buy it based on the fact it works with Windows and without any consideration of using it in Linux. You are therefore... stuck with windows. When told how to become unstuck you refuse to move but insist on others accommodating you. From my perspective that appears both lazy and arrogant, and I am clearly not alone in that perception.
And then you publicly criticize the negative feedback you receive...
If you give your money to an uncooperative vendor, even in ignorance, you reward their uncooperative behavior. THE FREE SOFTWARE COMMUNITY WAS HARMED BY YOU. It doesn't owe you a thing and it doesn't care if YOU get value out of their software. You are also confused: the vendor you gave money to is uncooperative, and your criticism of linux is ineffective because it is misplaced. Feedback to the vendor, in the form of a letter explaining why you will be buying your future cards from nvidia/hauppage has actually proven to be effective. Other people doing the right thing may eventually get you what you want, but at least have the awareness to know your actively harmful behavior makes you a less valued citizen of the community than a non-contributing leech.