PLEASE HELP

I have been giving mocks since January and trying to improve my scores ever since. But idk what's wrong and where I'm lacking in, from my last 8 mocks I have been geting scores in 30s with negative marking and without negative marking I get around 40+. I don't solve QT only 1 or 2 Question if I have time. Guys please give me tips that i can keep in my mind😭🤝🏻