First, college admission only depends on scores. As long as your college entrance examination score exceeds the admission line, there is no problem. College admission will not depend on whether you are a fresh student or a repeat student.
Second, if you choose to repeat last year's college entrance examination because your score is not enough, as long as the college entrance examination you take in the second year exceeds the admission score of your province, it will basically not affect college admission, because college admission generally only depends on your score, as long as your score is enough, there will basically be no problem.
Third, if you drop out of college and take the college entrance examination again, the same is true. There is a beauty queen in my university who dropped out of the previous university to take the college entrance examination because of the problems of his chosen major, and chose his favorite major.
So in fact, the college entrance examination is relatively the fairest, and you should be responsible for your own life. What about repeating? As long as you can go to college, that's good!