It's not paranoia.
Here's a quote from the book from Kubrick himself, a quote he used often, as Jan Harlan made clear.

PARANOIA IS JUST UNDERSTANDING WHAT IS GOING ON.

Madman? No. That's Definitely wrong. He cared about his film, and if that's a crime, then he stands convicted.
I cannot draw a line between caring and not caring. Either you do or you don't. Caring means I'm a perfectionist? So be it. is another famous quote, paraphrased by me.

The key card has a pass code to enter the picture file online.

What I say is true. Not paranoia. And I'd appreciate you doing more research before "letting it slide".