It's not infantile to believe that one of the roles of government should be to protect individuals from the gargantuan power amassed by corporations. There is no way to avoid capitalism through personal responsibility.
I agree that it's reasonable to ask one's government to intervene against a powerful and possibly monopolistic corporation. However, I think this should be accompanied by the personal responsibility of avoiding that corporation. I'm sure there are people that really rely on Amazon deliveries, but for most consumers it comes down to it being slightly cheaper and slightly more convenient. It seems like such a small amount of personal responsibility to ask of people to divest from this particular company if they think it's bad.
Most consumers expect that all available options in the marketplace comply with all regulations, and then make a surface level decision on the best option. So if there’s a company that is not competing in a fair way, there should be regulation to limit unfair behaviour (imo) -- otherwise every consumer needs to know every detail about every company and process and purchase with integrity.
