There is no triple dipping occurring here. Prime Video is included with the normal Prime membership under (1). So, (1) and (3) are true, but (2) isn't. I believe you can buy Prime Video (2) separately from Prime (1), if you don't want to pay the full price required for an Amazon Prime membership (1), but if you have (1), you don't pay extra for (2).
I've googled this just now, and I'm pretty sure about what I wrote above.
I would definitely complain about (3) too, but I think it's important to be accurate in the complaint.
And no, everyone who gets Prime gets bundled Prime Video as a hidden add-on cost.
Nah, I'll source my videos, music, books, and games in more DRM free manners :D Yarr harr harr and a bottle of RUM