Share your experience!
Hi, I had the same problem, and this is how I solved the issue:
Install the following app: dodol Wallpaper Maker 2, you can find it on google play.
Go to Make wallpaper, find the picture you would like to set up as wallpaper, and crop the image, and set up the crop as wallpaper. Done.
You are absolutely right, the one provided by Sony is not as good.