I hear your frustration. College is only 4 years out of a long life, and grades should really just be a way of ascertaining that you’ve “got it” about a subject, not the goal. On the other hand, college gives you opportunities you may not have again in life, to learn intensively and follow a path of study that interests you. Grades may or may not matter for your career goals, so there is some risk in ignoring that aspect, I hope you can focus on the core learning and growing part of your time here.