Nah, I'm not sure the comma is grammatical, might actually make the last part a contradicting enumeration. The blame is on me, I quoted out of context and was a

Nah, I'm not sure the comma is grammatical, might actually make the last part a contradicting enumeration. The blame is on me, I quoted out of context and was a bit on the slow side understanding. The sentence is just not written well, too. On topic however, missing one such conflict is easier, if you have to spot it after the damage is done, instead of having to think about it yourself beforehand, no?