>>2232687It could be various things, but assuming you successfully got the full sized "clean" image into some sort of software then ended up with that blurred result, my best guess would be something went wrong while resizing to shrink the transparent png.
Like maybe you shrunk it to be too small at first then enlarged it which lost the "cleanless" because it ended up enlarging a tiny image instead of shrinking a large one... in which case a method to avoid this that should definitely work for any software would be to start fresh with the large image and only shrink it until it's the desired size, never enlarge it.