Please never use word hate in your life.
You can say I dislike because you could not get good marks.
If you work hard you can like before.
Go to Google and search for khan academy they have given easy ways and means for the children.
To learn math, learn tables by heart.
Concentrate on definitions as well.
For English read English story books, listen English news and try to speak it as well.
Write daily 2 pages on a note book at home like a story that what you have done in school today.
Then show it to your father this is the way you learn.