The images in your gallery are typically of moving subjects walking past you. The main focus issues will be around technique. My guess is a number of focus misses are quick grab shots, so you might want to try tracking the subject and releasing the shutter when the composition and look are what you want.
Since the subject is moving predictably, I would use either single point or 9 point dynamic focus. With a subject moving toward you, 3D tracking may be appropriate.
AF-C will allow the camera to fire rather than refusing to fire if focus is missed. You'll get more misses - but you will have images to assess your work. I'd use AF-C since the subject is moving.
This is the type of photography that can benefit from the AF-On approach to focus. You would focus and hold the button down to enable tracking of your subject while adjusting focus.