Agape 4 - Does your OC have a religious faith which emphasises the importance of a love for all people? If so then do they try to follow these teachings authentically? Or do they just pay lip-service to them? If not then do they follow a more martial or mercantile faith? Or none at all?
Philautia 5 - Has your OC always had the same opinion of themselves or has this changed over time? Have they learned to love themselves - perhaps with the help of others - as their journey progressed? Or have the consequences of their actions only served to erode their sense of self-worth?
Dusk's love for his fellow man isn't religiously motivated at all, when you get down to it. His religious beliefs are kind of a mess, to be honest. He nominally still worships Halone, because some of the cultural aspects of that are really hard to shake, especially when most of your family still worships Her in earnest. Organized religion makes him skittish, though, what with Ishgard having been all ... Ishgard.
Obviously She is a martial goddess, and it's hard to deny that is ... probably the goddess whose protection he could use when he's adventuring. Not that he usually asks for it. While he can squint and see love in some of Halone's tenants and such, it's not the focus, and he'd like to stop thinking about religion at all now please.
The other question is a thinky one ... I think Dusk's opinion of himself has been fairly steady over the years. He was a lot less confident as a child and a teenager, but that's pretty normal, and he's been an adult long enough (he's pushing 40) that any of that sort of uncertainty has long since been discarded.
While he sometimes has trouble forgiving himself, even when he was at his worst and manifesting corporeal representations of his guilt, he never tipped into actual self-loathing. He wouldn't go around telling people he's a good person, but he does like himself, and he's very confident in his ability to Fix Things now.