Do you have any idea how many sea creatures there are, all of whom are shitting straight into the ocean, constantly?

Around 2 billion metric tons of them.

By contrast, there are only about 60 million tons of human beings.

Handwaving any differences in metabolic rates, the ocean animals are outshitting us by a factor of roughly 30, or, to put it another way, if every human turd in the world went straight into the ocean it would only increase the amount of shit in the ocean by around 3%.

Of course, the overwhelming majority of human waste does not get dumped directly into the oceans, so it's far less than that.

Corps quitting caring about the environment implies they ever did.

They did not until environmental regulations forced them to, and they ignore those regulations every time they think they can get away with it.

And individuals are not much better.

There’s been sewage in the seas and oceans for as long as there’s been sewage in proximity to those places. Long before caring for the environment as it’s now understood was even a concept. I’d hazard a guess that on a population density normalized comparison for developed countries there has never been a better time for responsible sewage handling. That’s not to say that there aren’t plenty of problems like this article highlights, just that it probably has not been better in the past. Hopefully the UK courts will hand this lady a decisive win and reinforce the idea that industry does have responsibility.