It's such a valid feeling, but getting snarky is only going to build resentment. You should tell him though.

Also, while I think it was hurtful that your husband complained about you to another woman, aren't you doing the exact same thing to thousands of strangers? What if he read your articles where you're complaining about your marriage and talking about how you want to leave him? Wouldn't that be just as bad as when you found the texts on the phone? I think it would.