Ok, since you don't want to argue I'll swiftly wrap this up.
Unfortunately, Caribdis will most likely not engage with you; reading, thinking and writing all this takes a long time. If you want to be heard I'd recommend you to keep it short or include a tl;dr.
Here's what I assume is your main point: "On the battlefield, Luna is unnecessarily cruel, which makes her less likeable." I just replayed the scene and I found it genuinely funny. Yeah it's somewhat cruel if you think about it but you're taking this more seriously than intended.
I'm having trouble seeing all this from your perspective, it all seems overdramatized to me. Sorry about that.