While that's no fun for anyone, that's not going to be enough to warrant a change in custody. Not trying to say that you don't have a right to be upset. I'm just telling you how the court is going to look at it. Most children his age think their parents are too strict. That's how the court is going to interpret it, unless there's some concrete evidence of problems in the home. Like grades falling dramatically, conduct issues at school or with the police, etc.
When our kids are supposed to be home a certain time, we expect them to be as well. We also have told them that they couldn't hang out with certain kids who we thought were a bad influence. I don't see those things as symbols of bad parenting. If she's telling him when and what he can say to you or his father... that's another story. But I'm sensing that it's more of a personality conflict than a bad parenting issue.
It is completely normal for kids to have mixed emotions about going back and forth between houses. It's not an ideal situation. But it's better than not having a relationship with one of their parents. There are things you can do to help the transition be smoother for him. I recommend the book "Mom's House, Dad's House" for learning about things you can do.
Also, no kid likes moving. It's completely normal for him to say he doesn't want to go. You have to leave your friends, you have to go to a school where you don't know anyone and you're the kid who talks funny and wears weird clothes, you have to move to a knew house, etc, etc. It's not fun, but he'll get over it and get used to his knew home. By the time I was 15 I had lived in 8 different places. I moved a LOT. I hated it every time, and wished I didn't have to move, and missed my friends. But I always got used to the new place, made new friends, and moved on. Your job is to let him know that everything is going to work out, and try to help him look on the bright side.