The majority of careers have no daily use for physics ... Other than being affected by the "Laws of Physics" (EG: Gravity, etc).
The best way to prepare for a career - find what interests you, and then figure out what careers use that knowledge.
I'm in grade 11 and ever since I chose subjects, my family always told me that taking physics "opens doors" to every other career in life. The thing is, I've been hating it ever since I chose it. I only get C's. Do you think I should drop it?
If it's not working for you then find something else. Don't quit in the middle though. Finish it and start something new. This is what you are supposed to be doing now. Trying out different things to find what you like and don't like.
I would have to say drop it and find something you're interested in. Most people seem to do better when they're interested in the subject.
I say stick it out. It is more to learning the subject matter, but learning how to think differently than you have been taught up to this point. Besides that there are a lot of things in this life you are going to have to do that you won't like. You might as well learn that lesson now. And even if you are getting C's that is a passing grade, and will look good on your transcripts when you apply to colleges. Dropping a class you are struggling with will not. Why not find a tutor that can help you understand the class better. Sometimes when you have someone else explain things they make more sense.
Yes you should drop it. I think it's important to take a variety of classes, so take something else now!
If you don't enjoy (at least to some significant degree) what you are doing, it will be difficult to ever be as good at "physics" (or "sports" for that matter) as someone who has always wanted to be a physicist or be in athletics---that's just a fact.
I assume you still have your senior year and various choices ahead of you. Math, physics, and chemistry are considered "indicator" courses by colleges to judge how successful you will be in their programs. "C"s" in those classes are not looked upon favorably.
How about something more technical in nature, but related to "physics" going forward?
Otherwise, use your senior year to try some different things. If you finally find something your really like, you can go to a junior college in your interest, get "A's"----which should be easier to do if you like what you are doing---and then transfer to a four year college successfully.
Good luck---your life is just beginning.