I agree with your first point (and I wasn't trying to defend Kavanaugh, just pointing out that the dissent calls something out), but I disagree with your second. Kavanaugh isn't lying - this ruling causes some chaos and uncertainty and I think that one of the reasons Kavanaugh doesn't like it is because it causes some chaos and uncertainty - but, to your first point, he doesn't appear to be acting in good faith.

The Supreme Court absolutely could have handled this much better, and is part of the reason there's so much to undo.