I don't like this kind of gawking site that pokes fun at poverty for shock value. I also find it quite ignorant.
About the "no toilet paper" thing. That has always been the custom in India and much of the world. Toilet paper is a western thing. Even in more developed countries like Thailand, there is no toilet paper. You either use your left hand or a spray nozzle. That's why you eat and greet with your right hand only. Toilet paper is wasteful and polluting and it doesn't even get you completely clean.
As for the bodies... that is normal. It's not even about the ganges or the river system. If you walk down the street in most heavily populated areas, like the outskirts of cities, you will see dead bodies. Homeless people there die a lot in the streets and there are no support services to remove the corpses.
Animals in the streets... that's pretty normal, especially cattle, which are sacred. As is varanasi, where the bodies are burned. Bodies in the river is actually quite rare. Most bodies are dipped in the river downstream from where the bathing and laundry takes place, but they are removed after the blessings to be burned. Bodies that end up in the river are usually homeless people.
Also, I would like to say that the site is very misrepresenting of India. When you walk down the street there, you'll pass a variety of stimuli. In one moment you'll smell garbage, in the next the sweet scent of spices or incense, in the next fresh produce, in the next excrement or livestock, in the next a cool breeze. That is just the nature of India. You have to take everything as a package. All that site does is focus on the grotesque (which definitely exists there), but it does nothing to show what is amazing, beautiful, spiritual, and inspiring about it.