Mock grades

I'm really disappointed, especially in English Language. Honest question, do you guys think I can improve or not? If I can, How should I? :(

https://preview.redd.it/5f0a4hqky08e1.png?width=1114&format=png&auto=webp&s=70b794d1ba204afd157306a01f7ef6e7be9912a9