I really feel for you as you face the challenges of an outdated education system. Some may say I'm sounding negative here but what I've said to my daughter who's in VCE and son who's in year 9 is 'Your dealing with a system largely based on competition, conformity, judgement and so on. It's not designed to take your amazing natural abilities into consideration. So, how are we going to help you manage your way through such an uninspiring soul destroying system?' They find my attitude amusing and liberating, as I don't cling to the old mantra 'It's school. Everyone goes through this!'
I wonder if you're naturally an imaginative creative person, which may explain why you're not a natural at Math. Some folk naturally have a brain that computes complex equations. Some have great natural intelligence in other areas. We tend to gravitate toward a calling in life that is based on our nature. What do you naturally love in life that gets you excited?
As a mum to a 14yo boy, I'm watching my son face a battle between his natural intelligence and his school work. He's a serious daydreamer by the way. He's also highly creative and a born environmentalist, whether that involves saving creatures of the ocean or simply swimming in it.
I hope this helps: I like to see 'disappointment' from a constructive angle as opposed to a destructive one. Just say everyone's appointed us the role of 'Math master'. We naturally may not have the calling of a Math master, it's not our thing. That appointment (appointed role) needs to be revised. Disappointing that role is a good start, the disappointment part. The next part may involve appointing a person who can help us manage Math, based on how we can naturally come to understand it. This may involve employing a patient family member or a good tutor. Now, we've got someone to help us cope with a subject we naturally have very little interest in and some lack of understanding in.
Year 9 or 10 is going to require you to focus on one of the most unnatural things in life. It's going to ask you to begin considering what you're going to do with the rest of your life, career wise. Unless you've got a crystal ball, this may feel stressful. This is a time in life where you're getting a feel for who you are. It's naturally not a crazy snap decision process where you suddenly just know.
You're feeling the dis-ease of a system that is not designed to be easy (which is insane). I'm sure you already know this because your a natural.