Don't know what you're saying...
Call yourself an idiot before calling me a troll. Affection for mother has nothing to do with preferring to spend time with or train with her.
I've nothing to back this up, that's why I used the words "I think". It could be Hiashi, could be Hinata, could be Hanabi. And BTW, it isn't obvious Hinata taught him. The dude also lives with Naruto, but did Naruto teach him Rasengan? That logic doesn't work. That dude likes training with those people whom he see's strong and worthy, like Sasuke. So Hiashi fits this criterion the best, though it's only a speculation.
If by any sentence in my post you felt that I denied Boruto's love for his mother, then I apologize for it. I never thought not preferring to spend time with her could mean he hates her (as seen by a barrage of posts full of misconceptions).
Boys his age mostly don't like spending time with their mom or at home rather they prefer spending time outdoors with friends or indoors with their favorite hobbies and electronics. Does that mean the hate their moms? No. So where did you get this fallacious interpretation of my sentence?
Also, maybe Bolt doesn't deem his mother worthy enough as a teacher considering the fact that he is always looking for the best in learning stuff. Maybe, he thought Hiashi was strong and could teach him better than his mom, therefore went after him. Can you deny this possibility?
BTW, to clear up misconceptions about me, I think Boruto is resentful towards his parents for whatever reason but he doesn't hate any of them.