I think Nietzsche had their number:
"According to nature" you want to live? O you noble Stoics, what deceptive words these are! Imagine a being like nature, wasteful beyond measure, indifferent beyond measure, without purposes and consideration, without mercy and justice, fertile and desolate and uncertain all at the same time; imagine indifference itself as a power--how could you live according to this indifference? Living—is not that precisely wanting to be other than this nature? Is not living--estimating, preferring, being unjust, being limited, wanting to be different? And supposing your imperative "live according to nature" meant at bottom as much as "live according to life"--how can you not do that? Why make a principle out of what you yourselves are and must be?
In truth the matter is altogether different: while you pretend rapturously to read the canon of your law in nature, you want something opposite, you strange actors and self-deceivers! Your pride wants to impose your morality, your ideal, on nature--even on nature--and incorporate them in her; you demand that she should be nature "according to the Stoa," and you would like all existence to exist only after your own image-—as an immense eternal glorification and generalization of Stoicism. For all your love of truth, you have forced yourselves so long, so persistently, so rigidly-hypnotically to see nature the wrong way, namely Stoically, that you are no longer able to see her differently. And some abysmal arrogance finally still inspires you with the insane hope that because you know how to tyrannize yourselves—Stoicism is self-tyranny—nature, too, lets herself be tyrannized: is not the Stoic--a piece of nature?
But this is an ancient eternal story: what formerly happened with the Stoics still happens today, too, as soon as any philosophy begins to believe in itself. It always creates a world in its own image; it cannot do anything otherwise. Philosophy is this tyrannical drive itself, the most spiritual will to power, to a "creation of the world," to the causa prima[first cause].
- Beyond Good And Evil (tr. Walter Kaufmann)