Okay, so let's take a look at the most famous picture of Earth that NASA ever took.
This photo has been compressed by Quora for display purposes, but my original image says it's 3000 x 3002 pixels. Let's say there are roughly 20–25 pixels of blackness on each side, that gives us an image size of roughly 2950 x 2960 for the Earth. Let's divide 7,901 miles by 2950. That gives us a visual scale of roughly 2.7 miles per pixel. That would make Mount Everest about 2 pixels tall, should be right there at the upper right. That scale would make the equatorial bulge about 5 pixels on either side!
Do you see the problem now? This photo from NASA shows the Earth as a nearly perfect sphere because it is! The variations from perfectly spherical are far too tiny to see at this scale. You're trying to see lumps and bumps less than a couple of pixels in size. You're looking for ten pixels of total bulge at the equator.
You can't see such tiny variations! You could easily measure them in Photoshop, but you can't see them on this screen.
This photo was taken from 18,300 miles away. From that distance, the Earth appears to be a nearly perfect sphere.