New interview with Christopher Tolkien

[Inziladun]

Originally Posted by davem

It could certainly be argued that if CT feels as he does he should direct at least some of his anger at his father for selling his pearl of great price in the first place. The book is still there for those who want to read it.

Perhaps he does harbor some resentment toward J.R.R.T for the movie rights' sale, internally. If so, that's his business.
One reason I see for CT's frustrations with the movies might be connected with the fact that before the world of LOTR belonged to this world, it was something the two of them could share. The author was sending the story to CT as it evolved, and perhaps CT bears some possessiveness toward the works that the rest of us cannot fathom. He might see Saentz and Co. not merely as withholders of money owed at least on a moral plane, if not a legal one, but more pointedly as having taken something dear that CT saw as a piece of his father's memory.
I have no idea if that is actually the case, but it seems plausible to me.