I thoroughly enjoyed the
Lord of the Rings and
The Hobbit but the
Simarillion was like trying to get through the "begatting" sections of the bible: So-and-so begat him, who begat her, who begat them and so on. Ugh!
It seems more like a text/reference book or an index to be used with Tolkien's other stories than any real story being told--just FUI on everything elvish.
I could be accused of being less intelligent therefore not mentally capable of truely understanding Tolkien's "vision" with the
Simarillion, (such as what happened when I mentioned on another forum I didn't understand the last Matrix movie--

--the machines HATED HUMANS and were WINNING so how could Neo make a deal with them when there was no need for the machines to agree to it? okaynevermindthat'sanotherthreadentirely), but I really think Tolkien had the Simarillion on his "To-do" list and just never got around to fully fleshing out the story.
Great authors do not always a great story make.