Do you over train? I am a huge fan of moving your body every single day, but not always to extreme fatigue. Over the years, we have learned a lot. We do CrossFit and we love it. When we first started, we had the mentality of just go hard every day in every WOD and no days off. We were sore all of the time. We learned that this might not be the smartest and you will see that as reflected in our programming.
CrossFit is a strength and conditioning program that is constantly varied. This is why you will see strength days as well as mono-structural training days as well. You still see crazy intense WODs, but we understand to get better, you need to balance your training. It is important to ensure a proper balance so that you get the rest needed so that your muscles can grow and you can continue to get fitter, stronger and faster.
Remember more is not always better. You need to balance your moving with resting. If you skip the resting part, you will minimize your muscle growth and increase your risk of injury and illness. So, if you do not take days off, start planning them in your week. You will find that they are just as important as your training days.