The problem isn't communism per se, but communism forcibly imposed.
More precisely, the problem is that communism is the superior system to the degree that it's egalitarian - that it eliminates the ruling class and instead treats all citizens equally - and the forcible imposition of communism immediately destroys that, since it presumes that those carrying out the forcible imposition rightfully possess the authority to do so, and thereby simply establishes them as a new ruling class.
Communism should be the goal, but in order to actually fulfill its potential, it MUST be voluntarily adopted by the people rather than forcibly imposed.
Sort of. The broad dynamic is essentially the same, though evolution is a comparatively tiny idea compared to anything that might come out of cosmology.
That’s a good illustration of my point though. Think about the complexities and the table-flipping along the way to our current understanding of evolution, then expand that out - we’re not just addressing the mechanisms by which specific forms of life come to be on this specific planet, but the fundamental nature and history of an incomprehensibly vast universe.
When we know - we’ve demonstrated to ourselves repeatedly - that we still don’t even fully grasp the facts regarding something as relatively mundane and constrained as the origin and differentiation of species of life, it should drive home how ludicrous it is to believe that we’ve managed to grasp the facts regarding the origin and history of the universe as a whole.