That's not at all how representative democracy works, and I suspect you know that. It's possible for a president to disagree with the regulatory decisions of a federal agency, because the agencies work for us, not the president.
And the idea that anyone in government represents the people is naive. The US isn't a democracy, it's demonstrably an oligarchy: https://www.cambridge.org/core/journals/perspectives-on-poli...
In an ideal world, we would pass a law demanding ISPs provide neutral service. However, this is far from an ideal world, and that will never happen.