Did you also miss this entire scene?
You know... the one where:
- He admits to have been deceived,
- Realises his emotions have been in the wrong place,
- And then decides to let go of said emotions and be a better man?
Did you miss all of that?
Wanting T'Challa to go back to being pissed off at everyone is character regression. It's regressing the entire thing you just called a story arc. That's why it's called anarc.
Can't believe we still have to argue this.