In the past, Canon was always well represented in the top 10 regardless of how recent the announcements were.
Is this something you keep data on, or is that just how you remember it?
Because if it's just your memory, it's more likely to be selective.
Look, the point that people consistently make here is that regardless of how a tiny fraction of tech-obsessed individuals may feel about what they perceive as Canon's "falling behind" their competition, there is zero evidence that this alleged technology gap has had any impact on sales. In fact, what evidence that is available points in exactly the opposite direction.
Canon's domination of the full frame market is probably the most significant market development out there. I know you don't like the Amazon best sellers, but they are the world's largest retailer and there simply isn't any other comparable source available. I would love it if B&H, Adorama, Digital Rev and others would publish their sales rankings, but they don't. So we have to go with what is available (and recognize that it is consistent with the sales figures reported by Canon and Nikon).
I just checked a few minutes ago. Canon's 5DIII body and their 6D kit are in the top 10; the 6D body and the 5DIII kit are in the top 20. You have to drop down to #39 this morning to find a Nikon full frame on the list (the DF). It's absolutely front-page news that a camera body that lists for more than $3,000 can be outselling $500 cameras. And, it's equally newsworthy that they are significantly outselling a newly released, highly anticipated and much-hyped camera.
Being disappointed or frustrated with a company is perfectly fine (although one shouldn't take it to such extremes). But trying to extrapolate some sort of death spiral for the company from your personal frustration when all evidence points in the opposite direction isn't rational.