That is the crux of online services.
There is no way to get into something that provides most of the content out there. Unless you are willing to pay for several services at the same time, there is no way to guaranty that a service will have the content you want to see. There was a time when Netflix was the de facto standard for TV distribution, but now every chain has its own service, with its own subscription plans and exclusivity deals. If you wanted to have a varied enough catalog, you would end up paying more than cable...
I would like to know if all the companies cannibalizing themselves actually helps them in the long run or just poisons the pool for everyone because of people not being able keep up with the options to watch Walking Dead, Game of Thrones, Narcos, WWE Raw or whatever is new without a subscription to the latest package.
This is one of the cases where I can't justify not using torrent or other pirate based formats... I am paying cable, which includes a subscription to FX, I shouldn't have to pay extra to FOX Play just to see The Strain without commercials or adherence to a strict calendar.