Calculus is often perceived as confusing and lacking internal logic, particularly in its treatment of derivatives and integrals. Many students struggle with the concept of dy/dx, which is sometimes treated as both an operator and a ratio, leading to misconceptions. The discussion highlights the need for a more rigorous foundation in calculus, which is typically provided in advanced courses like real analysis. While some argue that treating differentials as infinitesimals can be intuitive, others emphasize that this approach lacks clarity and rigor. Overall, a deeper understanding of calculus can be achieved through more comprehensive educational resources and courses.