Music GCSE

This is a tricky story to tell. I'm Year 11, taking Music GCSE. And yes, it's fine most days yet one thing bugs me.
Year 10 - March:
I was a singer- still am but very much lost it. The music teacher I have didn't like that I had a cold in March '24 and threw me into Bass Guitar for our group performance.
Bass guitar is a dream of mine for a character - but not mine. So he put the task onto me super quick before the component's deadline. I then quickly hated it due to my dislike of being bossed around, doesn't everyone?
Year 11- Sep to Now:
I talked to my teacher in September before bass lessons kicked in again. He didn't take me off bass because it'll "get you higher marks"...so I'm just a number machine to you? Grades over sanity?
I just finished mocks and I'm still furious on taking Bass lessons for their benefits and not mine. And they expect someone thrown onto the instrument to know it straight away - as if it was at my birth.
I grew up fairly poor and music never was something for me to play in, much more listen to. I never took interest in being the music, but I'm a songwriter now...time flies.
But you shouldn't force yourself to do something for their benefit, right?

with a lot of state schools, I believe they get paid/given more by the government for higher grades. that seems like I could be a reason you got chucked with base guitar. not saying its right that you were given it but I am saying what could be one reason for their actions.