Does anyone else's knee hurt really bad when walking down a steep hill?

Whenever I go down a steep hill my left knee hurts like crazy. It feels unstable and I hear a crackling noise in it on top of discomfort. It crackles whenever I squat down and go downstairs as is. It's done that since I was a kid so maybe it's either always been a crappy knee or too many bike accidents. I was sort of reckless on my bike alongside my brother. Used to take turns too fast and do all sorts of dumb stuff on a bike.