I have to agree with what you say, there are too many people waiting to pick SS apart at any opportunity.
Co-author of `Positive Aikido`
Aikido Controversy - https://www.youtube.com/watch?v=FMuDqKOjnls
Seagal clearly knows his aikido. I don't think anyone questions his aikido chops. What I think many aikidoists resent is the way Seagal acts. He is, for better or for worse, the most famous aikidoist in the Western world, and so his behavior reflects on us all. Perhaps it's unfair of us to expect Seagal to be an ambassador for our art, but his celebrity has put him in that position.