I used to suffer from knee pain after every squat session. Until an experienced guy at the gym suggested that there are aids that drastically improve the recovery of ligaments and joints under load. He explained that sometimes a more serious approach is needed than just glucosamine and advised looking into
https://body-steel.com/injectable-anabolic-steroids/nandrolone-phenylpropionate . Since then, I've forgotten what nagging pain after a workout feels like and can work with weights in peace.