Wranglers used to be the worst. Stiff, rough, chafing against your knees until they wear your skin off.
Then in the 70's, there was this product called Soft-n-Fade. Put them in the wash with a bottle of this stuff, loosened up the fibers in the denim, made them soft as a baby's butt.
Jeans were originally made to be these extra tough work pants. Then somewhere in the 50's James Dean and Marlon Brando made them a thing for youth culture.