In Marcus Aurelius' defense, he wasn't writing for an audience. What is now called his Meditations wasn't written for publication, just to himself. Also, Nietzsche's takedown of the Stoics generally in Beyond Good & Evil is pretty good:

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?