Captain Marvel was Jesus Christ, God, and the virgin Mary all rolled into one. A perfect being of unlimited power. She needs no one, she has the literal power of the cosmos at her disposal, to destroy goddamn planets if she chooses to. Her mannerisms in both comics and in the movie are disdain , disgust, and annoyance for anyone who gets in her ways. Her technical skills make Tony Stark look like a weeb fucking a shoe trying to figure out the meaning of Love. She doesn't need any other person/place/thing, she doesn't require any intervention or assistance from any 'living' creature as she can destroy anything that comes into her path. She's obliterated entire flotillas of battleships, killed MILLIONS of living creatures, and unleashed her will upon galaxies. She is more powerful than every single Marvel character but Death herself.
Now pretend Captain Marvel is the "Good" guy after reading all that.
Captain Marvel is an un-empathetic, uncaring, unsympathetic individual who only cares about what she BELIEVES is correct. This character is , as you so rightfully called it, boring to watch for 2 hours.
You could make a character like that interesting. Best example is Doctor Manhattan.