Tchalla seemed pretty in character to me this week. The fight was obviously short and I'm glad Sam didn't win and really wss never in control of it. I love Sam but he csnt take a serious BP on his best day for the most part.
Tchalla saying they arent friends came off to me more of a statement that they have their own stuff to take care of, not that he has some personal dislike of him. Tchalla sees him as a workmates when the situation calls for it not much else. He told him he respects him but beyond that he isn't going to bow to his opinions or wishes.
That seems pretty consistent with his character to me. He's not really the buddy buddy type like a lot of the other avengers. He's there to ensure his people and the rest of the world are safe. I do thing he's probably close with Cap(as in steve).
I liked the last scene on the building, and how he wasn't written as completely cold and unfeeling, but he also stood his ground.
For those saying the democracy isn't great, I mean it seems to me like the book agrees with you. Wakanda as a whole isn't portrayed as being in the right these past two issues, and TChalla himself says that he wouldn't have made the decision they did. So I view the whole thing more as an opportunity to free up TChalla for other stuff and give him an occasional thorn in the side, which I'm fine with.