You are viewing Biology as something on its own, rather than a product of its parts. The reason you have to do maths is because to understand Biology, at least at the higher levels, you will need to understand maths. If you don't enjoy maths you might find out that you don't enjoy Biology.
English can lead to jobs - are you interested in teaching? But if you despise it then don't do it.
There are heaps of options... but studying just for a job, well it makes the experience hollow. I occasionally have freak outs about my future job chances, and I panic. Then I think, I love studying. I love learning about society. Anything else I would do that offers a better job I wouldn't like, it wouldn't make me happy. I wouldn't want to spend my life doing it.
I don't know, jobs are important, but so is happiness. Think about what makes you happy.