The sad thing is this whole mess illustrates why we keep getting nothing but reboots.
PPG is a well-established brand with a large following, so the producers, who care solely about maximizing profit, choose to reboot/reimagine it both because it saves them from having to come up with anything themselves or take a gamble on an original idea, and because no matter how good or how bad the changes they make are, it will get people talking. As I said, Powerpuff Girls is universally recognizable. A lot of people like the original show. And the producers are banking on that fanbase to generate hype or at least publicity for their new version. Obviously people feel strongly about the original, and when you end up drastically revising it, they will make their opinions known and complain, maybe even decide to watch it for themselves to see just how badly they mess it up. It makes perfect sense - why try to do an original dark, gritty superhero show when you can just slap a well-known IP on it and coast on that previous success and brand awareness, even if fans of the original won't like it? Why try and build a following on your own when you can just siphon one that's already there? More importantly, people are passionate about the things they like, and when the things they like get fucked with, you can bet they won't just ignore it. And more importantly, social media absolutely thrives on controversy and drama, which combined with the pre-established following, means posts like "POWERPUFF GIRLS REBOOT IS WORSE THAN YOU EVER IMAGINED" is likely to get more clicks than "niche thing most people haven't heard of is a'ight". Even sadder is that people don't seem to realize that watching/buying things ironically is actually helping them. Bad publicity is better than no publicity - if bad publicity and widespread critical hatred could kill a product, shows like Johnny Test, Jersey Shore, and the Kardashians wouldn't have lasted as long as they did.
So yeah, can't wait for this to become the highest-rated, most-talked-about show of the season while people on Twitter complain about how there are too many reboots while lamenting the fact that the lower-profile shows and movies they didn't watch or talk about until after the fact flopped horribly.