There comes a time when the author tells a very sad and struggle backstory about an innocent character to get the sympathy of the audience .
The formula is simple take a character without personality then add some script outrageous characters or forget that add some extremely violent characters to let one shine the most.
The Boruto anime is simply working on a formula over and over again "Decrease the brightness of every other star so that the brightest one can shine" .
And the villains are just a few items where our star will show off his technology and the equipment he has created. There is also no respect, work or power scaling for the villains in this story . They are evil because they are evil. They have something to do with our star and they completely forget that there is a big world out there, the villains will keep running after a person and wait until they are defeated.
The audience doesn't like a particular character because he or she had a tragedy past or terrible things happen. For the action they take in that situation, the audience will love which part and personality they choose at that point of time. It makes a character likeable.
Kawaki doesn't have personality he is just running in own story as secondary character .
I am just hoping writers will fix this in future.