Tvistz, saying “I just…can’t. I detest it. No one understands how much I hate it here” makes you sound as if you are not approaching this maturely. I understand the attraction of southern California (especially if, as seems likely, you have been there on holiday). But it is not your only option for choosing universities beyond the UK.
As an EU citizen you have the whole EU to choose from- and English options in more places than you might expect. Aside from Ireland (which has some great options, and obviously is English speaking), here are some Finance courses taught through English in countries from Sweden to Italy, from Spain to the Czech Republic- and many places in between:
Most of them for much less than it would cost you to stay in the UK.
Irl, California is not a realistic option for you financially. I am not unsympathetic- San Diego is a beautiful place, with great weather- but the sooner you see that (at least for undergrad) you need to look elsewhere the sooner you can start building that path.