Chemistry was worse than math for me. Somehow they expected you to remember a variation of a formula from way far back, and understand that you could now use a different notation system to derive another, third formula from a new formula that you had just learned... but didn't explain that and just threw that new third formula (with entirely different units/inputs) at you and it always was a slog to go track down how it all went together because the mental concepts just didn't flow. I don't even remember the name of the textbook or the professor of the class, but I still remember those stupid blue boxes in the textbook where mental mindfuck took place.