It could be, but we can't know as it is now. Marx said the same for capitalism, and he may still be proven right. He said that capitalism will always lead to communism because it's a flawed system.
Again, if it's destined to fail, why have capitalist countries had to put so much effort into destroying them? If they actually believed they were destined to fail, like they like to say in propoganda, then they wouldn't bother with forcing them to fail.
As an example of a moderate success, Cuba has done pretty well for itself despite being entirely cut off from nearly all outside trade. They have a near 100% literacy rate. compared to the US's 86%. They also have world class Healthcare, again despite being cut off from the rest of the world.
The US has put so much effort into ensuring Cuba fails, yet it's still doing better than the US on many of the metrics that actually matter to the average person. How can this be true if communism is so fundamentally flawed?