Other has mentioned it, but I think it's worth quoting it directly for easier reference

> I previously felt bad for writing this essay after Adams’ death; it seems kind of unsporting to disagree with someone who can’t respond. These paragraphs cured me of my misgivings: after his death is by far the best time to disagree with Scott Adams.

Also I don't think this is a slander article only published after death so no one can answer. If anything I see this as a beautiful article from someone who (used to?) love him and it raises his image in my (not really cared about it before) mind.