Actually sort of have that in Denmark, in Yousee - can't really see anything about it https://tv.yousee.dk/ without being logged in but they have an online cable service which also allows you to take content from HBO, ViaPlay etc. as well as current content from free tv and cable you are signed up for.
They also offer HBOMax, Netflix, and Disney+ but when you take those as your media offerings you have to use the various sites which I think is a mistake (probably they have to do it that way because of contractual requirements) but obviously if you use up your potential media selections from an YouSee account on other providers at some point you probably think why am I using YouSee?
They call these services "private trackers" and "VPNs". They're inexpensive and probably have a better UX than whatever other five streaming sites you'd otherwise have to use put together.
Don't even have to do that. There are tons of "free" streaming sites out there that have a decent interface and a massive library that blows every single paid service out of the water.
