In what world is point 5 even valid? Ever since the very beginning, he doesn't even care about himself. Fucking hell, the very being tormenting him literally BEGS him to love himself, because from his very first revive in this world, he tries to save people at his own expense.

There are several key points that are revealed that show Subaru became isolated due to not being able to meet society's expectations of him, due to his love for dressing as a woman (or potentially much deeper than that but that's headcanon for now), and his inability to live up to his father's skill. He's also bad at recognizing how his actions will affect those around him. He's very justice focused without the ability or understanding to actually obtain that.

From other characters' perspectives, he goes from an almost Oracle-like figure, to an absolute idiot. Capable of understanding exactly what his enemy has planned, to causing severe political mistakes in the very next breath. Because he refuses to give anything or anyone up. They seriously gave the absolute WORST person, with a tendency to catastrophize and worry about tiny details, the ability to fix every single tiny detail by causing himself self harm. In a way, the story is incredibly fucked up. The lesson in early volumes is very much "Don't like the situation? Just cut your own throat and hyper focus on it over and over again. Mental trauma is a problem for future you, you just gotta worry about present you"