According to your understanding of English, you can't learn English well in the future. Now you think it's simple because there is too little content now. When vocabulary requirements come up, you will find this "fixation" a headache.

Besides, you have adopted lazy rote learning methods in English and math. Junior high school English has a small vocabulary and can be played well. But math is a little more difficult (in fact, junior high school math is also very simple, you can't play it. In short, you have never learned math with your brain.