The time to think about middlemen is before there's only one
I grew up near a mall that had 42 shoe stores. If a store didn't carry what you wanted, it wasn't a big deal to walk 22 feet to a store that did.
The core issue of net neutrality isn't whether or not a big corporation ought to have the freedom to maximize profit by choosing what to feature. No, the key issue is: what happens when users are unable to choose a different middleman?
In a town with ten newspapers, finding a newspaper that brings you the truth you seek is not a challenge. But network effects and lock in mean that in more and more arenas, there's a natural monopoly arising.
The simple example is cable TV. It doesn't pay to wire a town with five or six competing cable companies, and so we end up with one middleman. The simple understanding of net neutrality: When there's only one middleman, who gets to decide what you see?