What is low quality protein sources

Hi Jordan,
You once said that you don’t prefer eating low quality proteins on your main meals. What is low quality protein sources how do you define them.?
As a person who usually eat beans I would be very sad if you say bean has low quality protein
Thank you

Protein sources with low concentrations of essential amino acids, poor bioavailability, or both. I just don’t prefer non animal sources for my main protein sources at each meal, though I do obviously have plant sources of protein- usually in the form of trace proteins from rice, potatoes, oats, etc.- at my meals.

-Jordan