It's not. You have net neutrality right, but much of the opposition comes from attacking the fairness doctrine strawman or improperly applying slippery slope. But even as a net neutrality supporter, it would be interesting to see exactly how the FCC claimed this authority. Bureaucratic overreaching is still just as bad even when it is for a good cause.
What you think “Net Neutrality” is and what government thinks “Net Neutrality” is are two completely different things.