Never involved in Crossfit but am aware of what it is all about. I have been on weights for 25 plus years. Recently dabbled in bodyweight movements. Downhill ski, hike, mountain bike, etc. Anything that put the hurt on the body as you suggest is not a good thing as others have mentioned, your body is telling you something, listen too it. Most of us have made that mistake at one time or another and have learned sometime less is more, especially when of good quality.
You'll never see the light if you're in someone else's shadow, or said another way, life is like a dog sled team, if you're not the lead dog, the scenery never changes