Sorry to hear you feel like this! Don't worry about the update
I do it all the time I'm sure your chemistry test wasn't that bad, but even if it was, one test this early on in the course is not important apart from the fact you should learn from it so you can improve for next time. I think most people go through a stage of thinking they picked the wrong subjects (I know I have and sort of still am...). I just wanted to let you know that almost everyone is struggling with further maths at this stage. I walked through GCSE with no extreme effort and I find some of it extremely confusing (sorry I know that's not necessarily helpful, but it just goes to show how difficult it is). You can get through it
I would suspect that the hatred of maths is temporary, but if it isn't then I would suggest thinking about what made you enjoy maths in the first place. No person would choose maths and further maths if they really hated it before they started, so there must have been something that interested you about it. Try to find what that was and use it to enthuse you about maths again! You are obviously capable of maths, however if you feel it would make you happier then perhaps dropping further maths for one of those subjects could be a good option. I wouldn't advise dropping maths this early as I think you'd regret it later (but obviously it's 100% your decision if you went down this route).
tbh the exact ums of your sciences I would say are more down to grade boundaries than any particular maths (or lack of) in the subject. You got A* in them all so you clearly are very capable within them, and therefore must understand all the topics to at least a great extent, if not all. If you take my results (sorry more examples from my life) then by ums I scored greatest in bio, then physics then chemistry. But by raw marks my physics were weakest by miles, which was due to grade boundaries reflecting how the paper was found nationally.
To get an A* in all the sciences, and a 7 in maths clearly shows you are extremely capable of maths. While it's difficult, I think this point in term is the point many feel like it's impossible to continue with their subjects, but changing now would probably be even more difficult with catching up etc.
You are capable. You can do it!