Man, your English is far from good, if you were my student you'd be one of those who spend two extra weeks at school in December (the famous "recuperação")
I'll correct your sentence: Why people here in Brazil don't strive to learn English?
And the answer is: Isn't really necessary for most people, because they won't be travelling to another country, unless they live in a border zone, and excluding those who live in capital cities, most people will die without meeting a foreigner, do you think that in rural Europe everyone speaks a language other than their own? You're wrong! Most people learn a new language out of necessity