Back off the sharpness, you can't truly unsharpen a .jpeg in post editing software. Also, since you can't shoot raw with this software you have to make sure the camera generated .jpeg is the best it can be coming out. I find the auto white balance is too blue and switch to daylight, or shade, or cloudy depending on the circumstances. You can change that in Gimp, or PS, or Lightroom, but with a .jpeg you leave a lot at the scene if you don't get it right coming out.
At least this camera shows you results in real time which does help before a shot is taken. Turn on the camera and watch the image change as you change settings such as white balance.
Also..there are times when you need to change the exposure mode from average to center, or even to spot if you are going to do a close up of a person or flower, for an example or when your subject is back lit. Average will overcompensate.