You all might appreciate this short but enlightening article by Nick Longrich, evolutionary biologist, titled: Nine Species of Human Once Walked Earth. Now There's Just One. Did We Kill The Rest? [1] The short answer is basically, Yes, yes we did. I wouldn't be surprised at all if someday we find Bigfoot bones and realize we killed them off, too.
The other thing that comes to mind from this discussion is our long history as hunters and gatherers. The genus Homo spent a couple million years living in small groups and doing the hunter-gatherer thing. We've only been living in organized societies for about 12K years. But our brains are still wired for hunting and gathering and not quite adept at living in large, organized societies. We're still tribal by nature. I stumbled on this quote from a 1968 collection of conference proceedings that makes the point: [2]
"It is still an open question whether man will be able to survive the exceedingly complex and unstable ecological conditions he has created for himself. If he fails in this task, interplanetary archeologists of the future will classify our planet as one in which a very long and stable period of small-scale hunting and gathering was followed by an apparently instantaneous efflorescence of technology and society leading rapidly to extinction." (Lee & Devore, 1968).
[1] https://www.sciencealert.com/did-homo-sapiens-kill-off-all-the-other-humans
[2] Lee, R.B. & DeVore, I. (eds.) [1968], Man the Hunter. The First Intensive Survey of a Single, Crucial Stage of Human Development – Man’s Once Universal Hunting Way of Life, Chicago, Aldine Publishing Company.