I hate my life and I want to die. Help?

My life is such a major fuckup and I don't know what to do anymore.

Everyone treats me like a child.

For example, at school, I go to a K-8 school, and we still have assemblies, recess, and have learning programs that that are mostly child-themed (like Dreambox, Typing Agent)

I'm also treated like a child by my parents. My parents won't let me have a cell phone or social media, go out outside my own street in the neighbourhood, use the computer unsupervised, check up on me when I'm in a PUBLIC BATHROOM (It's really embarrassing), and are basically overprotective.

Whenever I try to grow up and be mature, for some reason life won't allow it, and I'm always pushed back down. No wonder why everyone wonders I'm so immature and irresponsible.

I also never listen for some reason.

I'm always trapped in my mind, thinking about the things I like, daydreaming, and I'm never listening. I don't know why I do this.

For some reason I never heed advice from anyone. I once had a counselor to give me advice on life, but I never heeded advice from her for some reason, and my mom was paying her too much, so she pulled me away from her.

(extending in updates)
Added (1). For some reason I always fight with my little brother. He's 7. Every little thing he does for some reason annoys me. I can't tolerate his singing, copying, anything from him. He never listens to me. Yet I still don't know why I continue to bully him.

I don't know HOW to be the big brother for some reason.

And also for some reason, I feel the need to get physical with him. And I can't help this for some reason. And I always end up getting into trouble.
Added (2). For example, yesterday, at the pool, my little brother kept spraying cold water in my face, and I got sick and tired of it. So I pushed him under the water (PUSHED, not HELD), and then when he resurfaced, he started crying, told my mom, and she grounded me form the computer for the rest of the week. (I'm not even supposed to be on here right now) And I HATE myself for this
Added (3). I also live in a country (the US) where the government is corrupt, there's constantly questions on here about cons and libs, the education system sucks (Seriously, they've dumbed down the standard to a 50% passing grade! WTF?! And I can't move out yet.), and other things.
Added (4). I've recently been wrongly banned from a Minecraft server for 30 days because it said I was fly hacking. I've filled out an appeal for the unfair ban only to get it rejected. The worst part is, I have an account on that server, and I wanted to be a moderator on it. But my punishment is a severe one, and I can't apply for 5 months.
FUСKING GREAT. Now I'll have to wait until November.
Added (5). And I also feel like I have a subconscious that's in some way, and some HOW, preventing me from WANTING me to get better, or, preventing me from WANTING to get along with my little brother, or, basically preventing me form doing a lot of things.

My life is such a failure, and now I feel like DYING. If things are constantly going to be this way, then I just don't want to live like this anymore.
Added (6). I've already started self-harming, but instead of cutting my arms like everyone else does, I bang my head against walls and I take burning hot showers. But it hurts so good. The day that I pushed my little brother under the water and got grounded, I took a burning hot shower, and banged my head against the wall 25 times. 5 times for my front, back, sides, and top of my head. Now I feel like I've killed some of my brain cells.
Added (7). I also have Asperger's syndrome.

What do I do?

Oh yeah, and any rude/mean/hurtful comments will result in a blocking.

(End of updates.)

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