Three years in high school is to prepare for the college entrance examination, with a very compact curriculum and more homework in various subjects. Especially in senior three, the examination paper must be done in a different way. Many students feel tired, which can be called pain and happiness. In order to enter the university, there is no choice but to do so.
However, in college, there is less homework than in high school. Only mid-term and final exams will make you feel a little tired. Most of the time, you are free. You can go to the library and join the club. The world is relatively free, and some of your homework is not necessarily written.
In a word, college and high school are completely different.