You could wait for Webby to chime and here's what he would actually say:
1> I can understand the gripe about iTunes. But you don't have to be tethered to iTunes. I'm not. In fact, I can't remember the last time I used it.
2> All those problems make me think there is something wrong with the phone and it should be exchanged.
3> You have to get the thing that makes you happy. If you don't like iPhone, then try something else. There's so many things to choose from. Maybe you can get a new LG or something. Or how about an Moto X. I hear those are good. Or maybe a Moto G? There's just so many choices these days.
4> As for the iPad, it's not meant to replace a laptop. And believe me, I feel your pain. Don't get me wrong, it's great but there are many school related things I would just rather do on a laptop. However, I love taking notes on it and reading books. Then again, there are many things I CAN do on the iPad instead of a laptop. So it all depends. If it's something that requires a lot of input, then a laptop is better. If it's just a lot of reading, then an iPad works. Sometimes iPad isn't compatible though. For example, at school we use this system that requires us to use Internet Explorer (which is weird). Luckily Firefox works for it. Chrome has some issues. So it all depends on what you want to do.