Yes well I am fairly sure in my mind that the Neandertals were out competed. They were quietly disposed of by the flint chipping knappers that came after them, killed off, or starved.
You can go back thousands of years, 20 or 25 thousand years since the beginning of cave painting. Earliest paintings were all first drawn by the artistic Neanderthals. They even dabbed ochre spots on cave walls, to represent stars in the sky. Beads and stones were decorated by Neanderthals living in south african caves.
I believe they were more artistic and gentle, than the meat eating, flint knappers

http://www.mazzaroth.com/ChapterOne/LascauxCave.htm

Plus there are much earlier cave drawings than Lascaux.

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"You will never find a real Human being - Even in a mirror." ....Mike Kremer.