You are always basing your conclusions for "who makes better cameras" on sales. But thats not how it works, you cant judge a camera on its sales.
No, I base my
conclusions on which camera is better (for me) using criteria and performance aspects that matter to me
. In my opinion, that's what everyone
buying a dSLR should use to make their own decision, and in most cases, that's likely the case.
It is a fact that Canon sells more dSLRs than Nikon.
Takes together, that suggests that in aggregate, more people have judged that Canon dSLRs satisfy more of their decision-making criteria.
Consider - there's an election, at the end of which (hanging chads notwithstanding), there's a winning candidate and a losing candidate. 'Winner' is based on a count of votes. You voted for the candidate you thought was 'the best'...but that candidate may not have won. You're entitled to your opinion, and if you picked the losing candidate, that doesn't invalidate your opinion. But at the end of the counting, you need to understand that the candidate you liked best lost, and your opinion is in the minority.
There are lots of ways to judge something. The problem is that the vast majority of them are biased by personal opinion. What's best for you isn't necessarily best for everyone. I use sales figures as a metric because that's one of very few unbiased metrics available. We could argue all day about which candidate would be 'best for the country' or which camera is 'the best for taking pictures'. But there was an election, with a winner and a loser...and Canon has sold more cameras than Nikon.
Those are the facts, plain and simple. If it helps, while you don't have the option to be governed/represented by the losing candidate, you can
go buy a Nikon dSLR.