Academia isn’t for everyone! It could just be that it’s simply not for you, especially if you don’t want to continue into S6.
Unfortunately considering how competitive university will be next year (considering a lot of applicants probably missed their grades or were asked to defer due to overcrowded unis) ABCC simply will not be enough for most universities.
You could either continue to S6 to get better grades or improve those Cs, go to college and complete an HNC that’s related to your prospective uni course, look for apprenticeships, or look for work.