Humans seem unique in all of nature in that everything we touch changes the environment for the worse. Never does it seem that our actions have ever led to anything positive ever happening in nature. I find that highly suspicious.
Changes to the environment WRT to nature are neither better nor worse. Nature does not work like that.
Human population has increased from half a billion 500 years ago, to 1 billion 100 years ago to 8 billion now. As we've spread out, we've changed the environment to suit us. There are some species other than humans (rats, pigeons, cows, thistles, corn, etc) who's fitness for survival is improved by these changes, but far, far more species who's fitness decreases in human-changed landscapes.
So think instead that instead of many diverse landscapes & environments with different challenges providing many different survival options, we have far fewer landscapes & environments providing far fewer survival options.
See? Do you understand now? It is not that humans inherently are bad for nature. Its just that we reduce environmental diversity & hence reduce species diversity. There is nothing remotely suspicious about this at all and it is certainly not a paradox.