If aggregators, dealers, and other "middle men" don't offer you anything you want, don't use them. Simple.
Note that the grocery store, gas station, and just about every other business you use is a middle man. If the grocery store doesn't offer you any advantage over ordering items shipped directly from manufacturers and producers, you can make that choice. Sometimes, I order things direct. Most of the time, it's more convenient and cheaper to go through an aggregator / retailer like Walmart.
If you want some of the services of a middle man but not all, you have that choice too. Sam's Club and other warehouse stores sell cases at low prices, just like buying direct. Internet distributors are another in-between option. Yet, most of the time we prefer the services of a middle man, a retailer.
More on topic, I have bought, and continue to buy data services through a middle man. The backbone providers sell 10Gb connections. They aren't interested in the 50Mbps I want to buy. My retailer IS very interested in my 50Mbps account and they work hard to keep me happy. If there's a problem with one of the backbones, they have the expertise and the pull to get it fixed.