Honestly speaking, my english grade has been slipping because I'm not really good at critical thinking and?

[Bunny Mr]

Critical thinking is to not believe everything you hear from the media, other people and society in general. It is to research and make your own conclusions based on logic and truth as much as possible.

General knowledge is a bunch of uselss bullshit schools are obsessed about. "General knowledge" aka general bullshit, is a hinderance as it clouds young people's minds with pre-conceived judgement and bias. If you have no general bullshit in your mind, then I suggest you cherish that, and keep it that way regardless of what social institutions say about it.