What is more difficult : change yourself or change people around us?

I've found an interesting page about learning foreign languages :

 Ти все робив не так! 

Thanks Marianna Megedyniuk for the article. 

But my question for all my readers: why is so difficult to learn English at school? 

What depends on the teacher? 

What depends on the courses' books?

 And say : how can we improve our teaching English?