Unfinished Tales - Part One - II - Narn I Hín Húrin

[Tuor in Gondolin]

Hope this isn't too off topic, but...

I have to say that, to me, Turin is perhaps (along with a
few of the sons of Feanor) the least likable of major characters
in the Silmarillion. perhaps one contributing reason is the treatment
in the Narn of free will. In Reader's Guide to the Silmarillion (1980)

Paul Kocher discusses (somewhat ambiguously) this free will problem.

In reflecting upon this grim tragedy of incest and suicide the
reader is apt to ask sooner or later wheather it is consistent with the
doctrine underlying the whole of The Silmarillion, that Elves and
Men have been created with wills free to choose between right and wrong.
This is to ask whether Morgoth's curse upon Hurin and his children
succeeeded, and this in turn is to ask whether Morgoth or Iluvatar by his
Providence governed the course of their lives...
Before and after the trances, however, free choices are made by Turin which
develop his situation in a direction leading toward his suicide.

He seems to be arguing both for the efficacy of Morgoth's curse AND
free will.