(( Warning: Just letting you know, my words may sound cold-hearted and what-not, but not only am I trying to help, but I've actually went through this type of situation myself... and possibly still am. Please understand I have nothing against you, alright? 'u' ))
*facepalm* .... *double facepalm* .... *headdesks*
After reading your post Asami, I've come to conclude that it's just like any typical child's rant regarding their parents and thinking that they will never understand. Here are my thoughts about your situation:
1.) I don't know if you have school or not because of this lack of sleep. If the internet is keeping you awake, then you must immediately realize that you have made it a necessity and that's no good. People won't miss you if you're not on 24/7-- that's life. If it is because of school, tell your parents that you've been studying and have been unable to sleep. When the grounds of you getting enough rest has been established, plan out your days more orderly so that you get enough rest to be able to get up and work throughout the rest of your day.
2.) If you wanted a laptop, you could've gotten something pretty cheap like the small HP laptops or one of those ACER laptops. They go for around... what, $200-$300? I got mine for at least $300. Unless whatever your parents got you was more cheaper, then I can see why they got you that instead of a laptop. But if you're in school, then let your parents know that you need something portable to use and work on so that you can have more time for yourself once you're back home.
3.) I believe you're referring to "God dislikes favoritism" and not "God created us equal". You're mixing the bible up with the constitution. Don't do that or else you'll be confusing people and that's no good. Also-- do your parents work? If they do, then they have every right to tell you and your siblings that you need to work around the house. I don't know how long your parents work, but if it's for too long, then you should understand and be considerate. Don't complain about them being lazy themselves when they have jobs to work on. If their jobs involve them standing or dealing with very rude people, then once again I shall mention this: you should understand and be considerate.
4.) In age, are you the eldest, middle, or youngest child of the family? If you're the eldest, then you have the responsibility to work in the house. I have to work in my house as well, so don't think I don't have anything to do. If you and your siblings all went to school, then I'm pretty sure your parents would be able to split the work for you and your brothers. However, if you live in a pretty small house, then don't complain. I live in a 2-story house, so I have a lot of work to deal with in here.
5.) Don't complain about not getting a birthday cake and what-not. Having a party and a cake is your common, typical celebration and it doesn't have to be big. When you get older, you'll eventually not care. Besides, your birthday is the celebration of your birth, that you're getting older, and that you've survived another year and you continue to live. For all we know, you can just hold a birthday party between friends! The important part of a birthday is that you should be grateful that you've still alive.
Finally, how I'm reading this situation of yours, you sound to me like a spoiled brat. Honestly, I'm just going to say it's a pride issue because you want to do things you want to do and if you don't get your way... no one will. Understand that sometimes, you need to humble yourself and do things for others. It may not get you forward in life faster, but it does leave a very good impression on you when people start talking about how awesome of a person you are.
Now, I don't want to appear as if I'm siding with your parents. Let me side with you also.
Your parents need to understand that they shouldn't speak to a child negatively because it only affects their child's self esteem. If they're putting you down and saying you can't do anything, tell yourself that it's their fault! They're supposed to encourage you, not DIS-courage you.
Well, that was too long beyond comprehension, so I leave you with a tl;dr version of this all:
-Stop complaining and thank God for still living, respect your parents and they'll respect you, actually start on trying to get work or something rather than being on here. I believe it also says in the bible, "Faith without works is dead." If you don't start something, it's not going to work.
In any case, just try to reason with your parents. After all, they have more burdens than you, and if you believe you have more burdens than them, tell them. And then once you become a parent yourself, you'll see how your parents feel when having to deal with children.