Ok, so is the gov't picking up you education tab, or are your folks paying it? when at your parents' do you have space that is yours? space you can keep tidy and quiet as possible. You will never get away from other people. I hear the neighbor kids about 20 hours a day, and I hear the adult neighbors sporadically. it's living in a neighborhood. Trains, cars, trucks, it's all there. even in rural areas, you will hear people (and trains, and cars and trucks and let's not forget the dogs constantly). You do have to live with that. at 17 you are trying to separate from your family of origin. You are supposed to do that (although it seems British and Irish kids have a harder time of it). why not go for a walk yourself for some quiet, or at least a different noise-scape? Take your brother once in a while so you can keep tabs on him & help him get along, too. My son and i walk and talk in the evenings if he needs to hash out something serious. It works quite well. Maybe walk with your mum and try to gently explain how all the bustle grates your nerves (no blame here)? if dad's laid off, he might be in fix it mode, and he might see his sons as neeing fixing. give him a set amount of time. something like "da, I know you have some issues with (whatever it is) I'd like to sit down with you for 20 minutes, but after that, can we set aside time to talk about it, rather than natter at each other all the time?" if nothing else you can corral when he wants to fix your life. yep, you sound ungrateful. and you probably are, but most 17 yo are, so no blame there. Just be grateful in your actions.
gads your attitude sucks. maybe they shouldn't have had any child other than you, so you could be completely spoiled and not have to...oh, gads, ...learn to get along with people. Glass houses, baby. grab some maturity before expecting it of others. I've dealt with more mature 12 year olds.