@Cyclone_Baroness:
I don't mind the tech. It makes things a little more interesting. Boruto on.the other hand is still a bratty shit.
@Razh:
Boruto's reactions bothered me until I realized he's acting his age. It kinda reminds me of myself. When I have to do something I don't like or want, I can sometimes bitch and moan about it, even though me and everyone involved knows I'm gonna do it anyway. A habit left over from childhood, lol.
So from that angle I can appreciate the author trying to keep it real. It's evident from the events so far that he intends to give Boruto some real character growth.
Speaking as a young adult who still has their teen years a bit fresh on their mind, I think the issue with bratty Boruto is a couple of things.
The first is that his complaining isn't really nuanced. Instead of venting his frustration through more mild and controlled ways like muttering or gestures, he acts like a typical shonen loudmouth that's too stupid for his own good, even for a kid. It works for Luffy because it's used for laughs or inspiring pride and perseverence that smarter characters act too complicated to do. With Boruto and his moments being more serious, it comes off as melodramatic. And on top of that, he does so right after being told an obvious valid answer for his objective that even a generational gap shouldn't muddle. And literally ditching a mission after declaring his dream is supporting the Hokage, even if he hates tech, is ironically too childish to take seriously. The Seventh might be his dad, but he is still his freaking commandimg officer and the cornerstone of his dream of supporting the Hokage. Running off like that would be more justified in one of the first few chapters, but not really now. Honestly, I think if you just cut out everything in between Naruto finishing the mission description and Boruto acting uptight on the train. Boruto being uptight on its own is actually a funny and realistic way for a kid to deal with their emotions, by being pretentiously "mature" and focused. Sarada calling him out on that was good, and it gives credit to how Boruto's dedication to his dream is still devotingly consistent.
The second is that, as weird as this sounds, Naruto is too cool of a dad. We can argue again and again about whether or not it's logical for him to use Shadow Clones to hang out with his family while really staying at work. But ignoring that and focusing on the moments where Naruto and Boruto are actually together… He's a perfectly fine father that is always right, patient, and caring. If the protagonist is going to be frequently rebellious and dismissive of his father past his amateur first arc, then Boruto's grievances with his father actually need to hold some legitimate weight so it doesn't just come across as repetitive whining. Not that Naruto has to be a complete douchebag, but having some more fatherly flaws in how he views and approaches his son that he can gradually improve on would help make the family tension feel more real, deep, entertaining, and fresh. You can only focus on a black-and-white dynamic of one person always being right/wrong so much before it gets predictable and taints you from finding one of or both characters to be likable almost by instinct. Sarada's relationship with Sakura is actually a perfect example of how this effectively works much more than what Boruto and Naruto have going, and not just because Sarada isn't a privileged millenial since you can still have reasonable issues in a middle class lifestyle. Even Naruto's relationships with Jiraiya and Tsunade got this right.
There is only so long you can keep justifying a character's annoyingness with "they're just a kid". They need to be likable at some point early on so that we want to support them as the protagonist, even if they have compelling flaws. And the kinds of stories I love with child protagonists is when the story can actually rope you into feeling their struggles from their perspective even though you're wise and old enough to know that they're wrong. Just because they're a kid is not an excuse for not making us engagingly empathize with them. Being obviously wrong instead is always going to look obnoxious.