Messy results after using the Content Aware Tool

If you are trying to fix something on the wall then choosing Surface instead of Object will probably help. You might also need to create some reference frames. I don't see very much around the outside of the mask that can be used to fill that big of a hole. If the camera moves a lot or the actor walks in front of the spot that needs fixing you are probably going to have also duplicate the layer, do some roto on the top copy and add a bunch of reference frames. 

This looks suspiciously like someone the workflow of someone that did not spend any time with the User Guide or the Adobe tutorials on using CAF. The tool will do a good job but only if you use the tool correctly. For something as simple as fixing a spot on a wall I would probably use motion tracking or corner pin tracking or even the clone tool. It would probably be a lot faster. But then, again, I don't know what the original shot looks like or what you are trying to fix.

It's a little tough to diagnose too well with just a still frame. Is it possible to post the video (ideally both before and after) so we have a better context of what you're trying to remove?

I don't know what it looked like before you created the fill, but have you tried other Fill Methods? Also, note that you can create multiple refernece frames. If the perspective or lighting changes too much this is a very valuable technique to use. I've had shots with six or more reference frames.