Grimdark is popular because when there is no light one can justify reveling in their own darkness and immorality.
Trek isn't perfect but it strives to be towards Utopia-29-31st century galactic unity mastery of time and space and beyond that to other galaxies and throughout the cosmos bringing light, joy, and an eventual universal federation finding a way to reverse entropy uniting with other multiversal federations and one day in the far far future walking through a bluish grey door and meeting Q as an equal.
That's where Trek should be headed.
Trek isn't perfect but it strives to be towards Utopia-29-31st century galactic unity mastery of time and space and beyond that to other galaxies and throughout the cosmos bringing light, joy, and an eventual universal federation finding a way to reverse entropy uniting with other multiversal federations and one day in the far far future walking through a bluish grey door and meeting Q as an equal.
That's where Trek should be headed.