By having search monopolies, they've gamified paying for placement above your competitor's trademarks. Rather than spend on engineering or lowering costs, you have to pay to defend your brand.
There are thousands of ways these monopolies are horrible for the consumer, for small business, and for innovation.
These companies force their way into new markets, kill the sustainable incumbents by give away services sustained on unrelated business unit profit, then raise rates once the field has been salted and acquired. Amazon is a grocery store, primary care doctor, home electronics company, and James Bond.
Why should Amazon get free advertising for their films on their web storefront, plastered on the side of their delivery vans, emblazoned on their packaging, when competing studios have to spend millions on marketing? To top it off, they're outsourcing the film crew labor to Eastern Europe where there are no crew safety laws and are putting American film workers out of business.
And the current price pressure on your salary is directly a result of their market power. They don't have to fear you starting a company that can impact their profits anymore.
These companies should all be dismantled. Large companies should be exposed to evolutionary pressures, but because of monopoly they become invasive species and dominate entire ecosystems. Regulation is the path to healthy competition and innovation.