The lack of unified interface is my biggest gripe. I pay £12/month for Netflix, £8/month for Amazon Prime, £6/month for Disney+. Used to have to pay £8/month for NowTV to watch GoT in 720p. My Android TV has a Google Play store embedded in it for me to rent/buy in one tap. I often find myself jumping ebtween 4 different apps on my TV to figure out what content is where to watch, and occasionally end up finding out it's an iTunes exclusive. That's assuming the content is available in the UK at the time - many TV shows just aren't available on any of the UK equivalent streaming services until months later than the US (Mandolorian for example)
I don't want the content for free/bargain prices. I want the content in a reasonable format, that I can play legally on my TV, phone or laptop, and that I can discover easily.
Compare that experience with something like popcorntime, where a user can type in a movie name, and have it streaming in 1080p/4k/highest available quality in under 30 seconds.
I want that, but paid.