I used to like math when I was in high school. Calculus (integration and derivatives) seem intuitive to me and made me understand math so much better. Now I'm currently in university majoring in civil engineering taking Calc III and I feel overwhelmed by everything taught in class. No matter how hard I try, I cannot understand things intuitively and everything feels disconnected. I can solve problems given by my professor but I have no clue what I am doing or what the answers even mean. Why is math so hard?