So basically, Net neutrality allows an open internet, where ISP's cannot prefer certain websites compared to others. That means you have access to every website, and all at the same speeds.
Without net neutrality, ISP's can determine what you are able to actually load and see on the internet, and with the ability to turn it into cable-like packages. They can charge you a base fee to use the internet, like they do now, and then offer you packages to access certain pages, like a social media package, or a sports package, which would add onto your base price. If you don't buy these packages, you basically cannot access these websites such as facebook, or twitter, or ESPN, fox sports, because they would throttle the connection to them where they basically don't load.
I could imagine ISP's creating a small forum package, which if you don't pay the extra fee, websites like this would be inaccessible.
Another way no net neutrality screws us over is that ISP's can force businesses to pay to be able to be included in certain packages. For example, Comcast could force Netflix to pay a large fee to be included in the video streaming package. This would force Netflix to raise its user fees per month to cover it. So not only would you have to pay extra just to access the Netflix website, but you would also have to pay extra for netflix itself, doubly screwing you over.
So overall, no net neutrality doesn't benefit anyone but ISP's, and will make us pay a whole lot more for a whole lot less. Its all a bunch of bull and not surprising that the members of congress who are supporting this have been paid an average of $50,000 each by ISP lobbyists. Don't believe that? Here is a list:
https://www.theverge.com/2017/3/29/15100620/congress-fcc-isp-web-browsing-privacy-fire-sale
(This list is from when Congress voted to allow ISP's to sell your browsing data, but it still applies here)