As above, unclear what the issue with a foundation year is. Pretty normal way into things if you did the "wrong" A-level subjects, and plenty of good unis for that subject area (e.g. Southampton) offer that route.
Outside of it though realistically most non-STEM, non-language, non-creative/performing arts degrees don't have any specific requirements. Archaeology, anthropology, sociology, social policy, politics, philosophy, film/media studies, English literature, history (many degrees don't require A-level History), geography (some don't require A-level Geography), regional/area studies courses (e.g. South Asian Studies, Eastern European Studies, African Studies), some language courses even (particularly non-European languages as they are normally offered from scratch), classical civilisation/classics (usually there are routes for those without a classical language background), ancient history, business studies, management, education, social work, some healthcare professions courses may be an option, etc, etc.
I think you overestimate the number of degrees that require specific A-level subjects.
That said you should aim to retake the GCSE Maths as many universities require a 5 in GCSE Maths for any degree they offer as a minimum standard. Also if you are interested in pursuing a science degree of any kind (via foundation year or whatever) you need good general maths skills - including for marine biology or oceanography.