Capitalism did not arise out of ideological reasons, but as a material process with the shift from small manufacturing to large industry. It arised historically, not because it is natural (it’s only a few hundred years old) nor because someone thought it was a good idea. The mechanical process is as I described. Ideological justifications for it, ie liberalism, arose after the fact.
Value is created even in non-Capitalist systems, and further, western Capitalism is Capitalism of a more developed stage. You cannot perpetuate small market mechanics, small firms will either grow or die. Once markets coalesce, there really is nowhere to go but revolution and Socialism, or barbarism and collapse.
The problem of ‘growing big’ has to be solved via cooperatives operating in the same markets, not by disbanding the entire system.
That’s not a solution, though. Cooperatives within Capitalism are subject to the same rules as other firms, only without firm control of the state. These cooperatives will either grow or die, and you end up at the same necessary point, revolution and Socialism, or barbarism. Centralization is a fact of markets that sustain over a long period of time, ergo we should master those laws to make it as democratic and equitable a system as possible. In other words, Socialism.
My brother, I gave you a version of capitalism where workers globally own the means of production. We’ll even put measures against monopolization, labor exploitation, and short term profit seeking. Hell even add 100% taxation over a billion dollars so nobody gets too big. You’ll still won’t like it because it ain’t communism.