Of course there is almost no resistance to their dominance because we live in a time where legislators favor large businesses (because Citizens United). Examples of a broken regulatory environment... FCC turns a blind eye to deceptive practices like Amazon’s false advertising (BuyNow button for ebooks that you don’t really buy). The patent office gives patents for trivial improvements like the OneClick purchase button, which obviously helps large businesses with big legal expense accounts. And the grand daddy of anti-competition is the ability of technology giants to spy on other businesses, Amazon, Google, Apple etc snoop via their platforms and analytics services to choke out competitive threats. How do they choke them out? They control the search engines and browsing platforms as biased referees, so they decide what we see via recommendation tweaking (which is also why the Advanced Search features in these platforms, appstores, market places, search engines, are quietly disappearing, they make it harder to skew the playing field).