Eh, I think people exaggerate how confusing KH's story is all the time. Like they either haven't played most of the games or they are jumping on the hate bandwagon. Now mind you, this is different from people thinking the story is stupid, that's fair if you think that.
You grossly misrepresent what actually playing the games and experiencing the story as intended is like. There's absolutely no reason you would have to be pausing constantly throughout the games and writing things down to keep track of plot points. I mean, the whole infamous Ansem Seeker of Darkness/Ansem the Wise thing is explained basically over the course of an entire game, including Ansem Reports, character dialogue and a drawn out cutscene where Mickey clearly explains it to Sora. You're given plenty of time to digest that information.
The story is developed over all these games and all these big plot points are spaced out and explained one at a time at a very manageable pace with the exception of Dream Drop Distance (imo). It's very easy to follow and understand the plot of KH but of course it's easy to drop all the plot twists that have been developed over a decade in a few sentences and have it feel overwhelming and confusing and just impossible to understand.
I feel like with the most minimal research into the series you would know that these other games exist and you wouldn't just jump from 2 to 3. If you somehow go into 3 without knowing that, it's really on you. It's not as if Square Enix hasn't made it clear over the years that these games exist.
As annoying as it was to have all the games scattered on the Gameboy, DS, PSP and 3DS, those games are all now available on the PS4 in convenient collections. The first two collections that contain the majority of the games in the series were even on PS3 so I feel like your issue here isn't even relevant anymore and it hasn't been for years.
