But "Plastics" could be a candidate.
The stupid part is that we're not using nuclear energy, and have irrational fear of nuclear waste relative to much more dangerous, potent, and undiscussed "conventional" industrial waste.
Also naturally ocurring nuclear reactors are a thing. On the surface, too, I'm not talking about the Earth's core here.
> gross water mismanagement
Animals do intentional and unintentional water management too.
> fossil fuel mining and usage, all things plastic
Fair enough, this is unique-ish and we are mishandling it, though the use of either isn't bad per se - rather the unsustainable use.
> hunting and killing for sport and other non-nutrient-related desires
Have you ever seen a cat?
> extreme resource hoarding
That's a fundamental thing all life does.
Keep in mind that nothing in nature is thinking forwards - all life is self-destructively greedy, and nature doesn't care if e.g. some beavers dam a river and accidentally flood a whole valley, killing themselves, their offspring, and extincting a bunch of unique flora and fauna. The stability you see, that people so love and associate with nature - it's not a fixed thing, it's a temporary equilibrium in life killing other life.
Name three.
I can think of one: we landed stuff on the Moon and beyond. I think that otherwise, nature has a hard time reaching out beyond low Earth orbit.
Other than that, I can't think of anything we'd consider massive fuckups that nature didn't do better. We're definitely tamer than anything else, considering that life itself is a mass murder fest at every scale, from molecular to planetary.