Glad your a Doug fanboy and all Gman but just calling Carley dumb repeatedly doesn't defend your point. Some of those things are actually not dumb
If you had something that people could use as fodder against you, it's absolutely the smart thing to do as long as it is tactful. What better way to deflate a trump car than to turn it on its head and make it no big deal? So explain calmly to people one by one you were sent to jail or have lilly blab through her filter to the group you're a murderer? I'll take option A please.
So she said it in front of Clem? Clem doesn't know the full story and clearly does not understand it until you decide if you want to explain it to her. She expresses understanding and more or less acceptance when you do tell her as well. And Carley kept to her word to not tell anybody if you ask her to. That counts as being trustworthy and not dumb.
And calling somebody out for being irrational is not stupid either. Sometimes you need to be harsh to make people calm down. Plus she was also trying to stand up for Ben so she had altruistic reasons to doing what she did. Lilly was not going to be dissuaded either way so in a way Carley did sacrifice herself by directing Lilly's anger to her.
I can say things I like about Doug at least even if I personally find him less interesting as a character. He is clearly a very genuine guy, he's funny, he is smart, he is resourceful, he cares about group safety, he is sympathetic for his grief over Carley (see, even he thinks she is awesome

) and he is trustworthy. It doesn't make him better or worse than Carley, but just a different character. My main complaint is that he is not a particularly charismatic or proactive character. Not because he is lazy or weaker, but he is just a follower. It makes him fall into the background a bit more against the other stronger personalities like Lee, Carley, Lilly, Kenny, Larry and Clementine.
Keep in mind too that this is a thread inviting Carley defenders to voice why they like her. You can disagree, but just calling everyone stupid who likes her is counter productive. At least I can meet people at a middle ground and say what I like about every character since I think it is a strong ensemble overall save for Christa and Omid (at least for the moment unless they get more development).