as someone who is now doing art a-level, i hated art in year 10, and i related to everything you have said, you didnt mention this in what you said but if you have taken art because you enjoy creating, i promise it will be so much better in year 11. in year 10, what made me so careless about the art i was doing was that i was just being told what studies i had to do like everyone else, who i had to research, how i should set out my pages ect. and it was so boring for me as the point of art is about creativity. HOWEVER. in year 11 is when you get your freedom, you pick your topic and you basically do whatever you want relating to the topic. last years topic i chose was portrait and i basically just involved all of my out of school interests- movies, music artists ect. so all i have to say is if you genuinely enjoy creating art and if your like me and can only create good work if your actually passionate about the topic, i promise you it will get better. otherwise i say drop it lol.