It was rooted in how I was treated with my "grandparents" and sometimes my parents.
When I was young, my parents wanted me to finish my homework before I did anything else (except for eating). Breaks did not exist. Even if I was doing homework for hours at a time.
--
When I was also young and into my younger teenage years, my "grandparents" would never accept a B. They would consider it to be failing. They would often say things similar to "no wonder, you're always spending time on dumb shit," any time that I would try to say that I can't keep up with the work. But if I said that I was dumb, the would simply say "you're so intelligent, you just need to try harder."
My hobbies were often deemed unimportant, but if they let me follow a hobby and I lost interest in it, they would force me to continue because "we spent a lot of money on this".
My room was never clean enough, everything had to be put away out of sight but also not just "shoved into drawers", if I was running out of space I just had to throw things away. I had to fold my clothes no matter what. I had to always do my laundry the second I was old enough to understand how to do it.
If I didn't do my chores the second I got home, I'd be called lazy and spoiled. If I didn't do my homework immediately after chores, they would take my phone away or refuse to feed me for from as little as one meal up to a week.