Biochem Professor

Hey! I’m a microbiology student, I’ve had this biochemistry professor for about 2 years,she’s also the head of our department, she teaches biochem by reading through notes like (the hydrogen leaves, this gets oxidised etc etc) she has only ever drawn structures/reactions once when i asked her cause I couldn’t understand the TCA cycle. She was teaching us purine nucleotide synthesis today and I just couldn’t understand a single thing. Is this normal ? Are your biochem profs similar ? I’d love to know cause I really dislike this way of teaching