I’ve been headcanoning Drew as having emotionally absent parents for so long that if it doesn’t become canon, I’ll honestly be more surprised.
It’s probably the most stereotypical family dynamic you can give a rich kid: spoiled materially, but his parents are always away traveling for work and/or just don’t give basic emotional support even if they’re physically there. But that’s exactly why it fits into a show like TMF.
Also, Hailey and Drew feel like narrative foils, so this would fit with that perfectly too. Hailey has supportive parents who encourage her to pursue her passion, yet she feels shunned at school. Drew, on the other hand, has parents who are never really there for him. Instead of encouraging his individuality, they expect him to grow up just like them and discourage him from pursuing/having any own passions.
Without even realizing it, Drew doesn’t really feel at home in his own home, so he copes by making the school feel like his territory. And because he lacks any real sense of autonomy over his own future, he unconsciously feels the need to control the people around him.