I think math suffers from a motivation problem, especially past early arithmetic education.
Reading? Now I have access to all these stories! And it's plainly useful in every single other class, pretty much constantly (even math class—go figure, this math book has more words than numbers in it!). I can read subtitles (on anime, say—it's gone pretty mainstream now, for kids). I can read video games without voice acting, and follow them (Breath of the Wild requires lots of reading, for instance). It is constantly, obviously useful, and enables access to lots of things that most kids want to do.
History? Social studies? Largely an application of reading—and hey, look, more stories! Great! Oh and now I understand that movie I watched better, or that game I'm playing.
Science? Well look at that, a ton more reading, and when it's taught halfway right it's like working through a mystery story, even. Fun!
Math? It really seems like you're just doing it for its own sake, and... that's it. The actual facts or what's intended don't matter—that is what it feels like. It's occasionally useful in other classes, but not constantly like reading is, and often that math is pretty simple compared to the stuff you're learning in math class. Kids aren't dumb and recognize quickly that word problems are contrived, pandering, and ridiculous, and meanwhile have a hard time finding applications for any of this even if they go looking for it. Their parents? They probably see them rely on reading (even just signs or directions) 1000x more often than they see them apply math beyond what's taught by 6th grade. Reading? Useful daily. Math? Only occasionally, and it's mostly the simple stuff.
To a student, it feels like math is about as useful as learning some constructed language that everyone's telling them is super important but in their actual experience sure doesn't seem to be—I mean, no adults they know even read, write, or speak it, and they seem to be getting by just fine. It feels like you're being gaslit or having some kind of practical joke played on you. Of course it's hard to care about it, unless you're the sort who just loves mathematical puzzles, like the way some people are really into crossword puzzles, but most people aren't.
I don't have any kind of solution to this, but IMO it's the fundamental problem with math education.