Competition is always a good thing.
I don't think in America that the American people care if the company is
small or large. I think they care about what they get and the price.
When big companies, especially Cable companies monopolize content it decreases competition and increases prices.
If Cable companies own most of the Cable channels. They raise the price entry for alternatives like Sling TV or Playstation Vue, who now have to deal with their own competitors for content and to continue licensing those Cable entities.
The net effect is that prices across the board go up.
As for ending net neutrality,
It could be the first step towards online censorship, such as the war on "fake news"
The Feds no longer have to chase International Cyber Crime in the US when they can require the ISPs to block it entirely.