‘Cooper wins’ is maybe too simplistic of an explanation of my view of the ending (as an explanation using two words would be), though I do feel that Good ultimately Prevails.
quoting myself in a comment on reddit: there is truth in what you say about the importance and power of the ‘bad’ ending—I really don’t want to take away from that. but also, deep down, I don’t feel that the True Ending, if one exists, is that sad message of ‘evil always wins.’ I think it’s something more messy and confusing. something along the lines of… evil always seems to win, but good does ultimately prevail, even though the condition of its victory means that the Good can never bask in the glory of success the way Evil always seems to—that denial of satisfaction at the mission accomplished is the mission. it is accomplished.
also from the essay: “This climactic walk in part 18 up the steps to the site of Laura’s abuse and torment, and then back down again, set to the strains of “Laura’s Theme” ringing out in episode 17, is the triumphant moment of integration. There is no ridiculous showdown between a superhero and villain, there is only the simple confrontation and subsequent integration of her trauma.”
so the Carrie Page/Odessa universe = dissociation… her journey back to Twin Peaks & Laura = the reintegration of trauma, sealed with a scream of recognition = defeat of Judy & destruction of Judy’s house (source of abuse) = a woman made whole again