Why is standard oil bad?

Standard Oil was criticized for its monopolistic practices, which stifled competition and led to higher prices for consumers. The company used aggressive tactics to eliminate rivals, including predatory pricing and secret deals with railroads, resulting in a lack of fair market competition. Additionally, its immense power and influence raised concerns about corruption and the undue influence of corporations on government policies. Ultimately, these practices contributed to the push for antitrust laws in the United States.