There is nothing BAD about my knees. My knees are not: disappointing or unpleasant; of low quality or evil or morally unacceptable.
Those are all definitions of “BAD” knees.
My knees are awesome. I may need to buy some knee pads or a knee brace that says “Awesome” just like my “awesome socks”. (You can buy your own Awesome Socks!)
My knees have carried me around for fifty years. They have allowed me to squat, to kneel, to crawl through tunnels. They have allowed me to dig really big holes, to shovel horse manure for my gardens. My knees have allowed me to climb trees and hop up,
over and scramble over boulders.
Do these sound like BAD knees? I think they are awesome knees!