The array-pointer decaying magic in C requires too much mind-bending. Most of the standard library for string processing is insecure. No boolean types. No name-

The array-pointer decaying magic in C requires too much mind-bending. Most of the standard library for string processing is insecure. No boolean types. No name-spacing. One-line if bugs (ridiculously common for beginners and even experts). I could go on and on. Frankly - I would have preferred to learn assembly as a first language rather than C in my college days.