The takeaway of this meditation is that anger as a reaction to that which is external to us is more forgivable than anger as a result of our own addictions to pleasure. But also all failures to be perfect are not only normative along the stoic path they are expected. You should be no more or less kind to yourself depending on the sort of failure. Just pick yourself up, remind yourself that it has already happened and that you have the rest of your life not to fail again. That's what Marcus did, it's what I do, and it's the best anyone else can do. Do not let anyone tell you otherwise.