Well, just from your first post I have to say that I don’t understand why you don’t want to study in Dubai, other than that you simply don’t want to. To be quite honest, your post comes off like a childish rant. I say that not to be mean - but because it likely means that whenever you have this conversation with your parents, it may also sound like a childish rant rather than a rational argument that they should listen to.
First - well, I can’t be sure how common it is in the Middle East but in the U.S. it’s relatively uncommon for people to go to college outside of their home country. It’s very expensive! In addition to the cost of the university, there’s the cost of immigration and visas or whatnot. And then there’s the difficulty of them potentially getting to you if they need to in an emergency.
There are a couple of American universities that offer degrees in Dubai, including the American University in Dubai, American University in the Emirates, and Rochester Institute of Technology. There are also some other universities from the Western world with satellite campuses there, like the University of Wollongong (Australia), Middlesex University (UK), and the Canadian University in Dubai. If your parents are okay with Abu Dhabi, there are even more - NYU Abu Dhabi, Paris-Sorbonne University Abu Dhabi, and New York Institute of Technology.
The other thing is that, if you are a traditional-aged junior in high school, you’re 16. You have your entire life to try out new things and live in an English-speaking country, if it’s your dream. I say the same thing to high schoolers who dream of moving to New York or LA in their adulthood. It’s probably more fun when you’re working full-time and have your own money to do what you want.
And here’s the thing - your parents aren’t even being completely rigid and telling you you can’t go to college outside of Dubai at all. They’re just saying they want you to stay in Dubai for the first two years, and then they’d be willing to pay for you to go to the UK. You are the one who is coming off as unreasonably uncompromising here.
Have you asked your parents why they want you to stay in Dubai for the first two years? Understanding why they want that for you will help you come up with arguments and points for discussion to try to get what you want.