Most of these definitions (with the exception of the Century Dictionary) would suggest a definition for “anti-capitalism” as primarily being against an economic system based on private ownership of capital, not the concentration of wealth in the hands of a few. While these two things are compatible and perhaps even causal, they don’t inherently require each other. You can have extreme wealth in a non capitalist system, or a capitalist system with strong caps on wealth accumulation. Perhaps a better description for your position would be “anti-extreme wealth” rather than “anti-capitalism”?