I feel my dad is partly to blame for by bad grades.
Why are you blaming your dad for your bad grades?
My dad is frequently drunk and he's not motivating me with good grades.
I'm sorry your dad is drunk a lot, that must be difficult. But it's not fair to blame someone else for your bad grades.
God, you sound like my dad. I'm so sick and tired of lectures from people.
Maybe you could talk to the teacher and stay after school for a bit. This way you can get one on one help to improve your grades, and also spend more time in a healthier environment than your house.