I don't think it's specifically anti-
4e. The key argument appears to be that fantasy which is based in myth, history or legend is better than fantasy which is completely original (or at least modern). A side point seems to be that fantasy which is completely original tends to be about cartoony superpowers.
While I don't disagree that fantasy which is based on myth, history or legend tends to be richer as can draw upon pre-existing elements, I wouldn't dismiss completely original fantasy as being automatically inferior, or being about cartoony superpowers, either.
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