That's just the nature of life in general, to expand to fill the niche, even at the cost of other things that were previously there, until carrying capacity is reached. If anything humans are pretty unique in exercising at least some restraint, particularly as we are now poised for a drastic voluntary reduction in population over the next hundred years or so - an instant in the scale of things.
Is it sad or "fucked up"? I suppose, compared to some imaginary ideal that never existed in reality. But at some point it's like getting angry with dandelions for trying to grow in your lawn. We were never not this and neither was anything else.