I somehow graduated from the upper class QM and Thermodynamics courses with A or A-. I think the average grade on exams was between 30-40 out of 100. I saw our TA at the bar and he gave me the most reassurance I’ve ever had - he said almost no one taking the intro courses really understands it the first time through, and neither did he.

It was also weird to know that then as it still is today, the only wave function that can be solved is single atom hydrogen.