Yes. But first, I assume you mean book-based intelligence as there are many different ways to be “intelligent,” such as physically, relationally, emotionally.
Performing well in school is comprised of several skills, including test-taking, relating well with others, collaboration, etc . Anxiety, fear, issues at home, etc can cause anyone to perform worse than they otherwise would, especially on tests. If your authority figures at home (eg parents) are terrible, then you are very likely to dislike the authority figures at your school, which will cause problems and often lead to poorer grades.
Performing well in school is comprised of several skills, including test-taking, relating well with others, collaboration, etc . Anxiety, fear, issues at home, etc can cause anyone to perform worse than they otherwise would, especially on tests. If your authority figures at home (eg parents) are terrible, then you are very likely to dislike the authority figures at your school, which will cause problems and often lead to poorer grades.