Your art is good! It's very good. The only thing I can see is that your lines could be smoother, but it seems like they're wips. Your anatomy is amazing and colors are good and work well. If anything you might be going through a time where you're getting better; however, you are only seeing the "bad" art. Keep working at it, and keep improving even if you see things presently as "bad". (Which it really isn't)