What do you expect? He's an elf. Time just does that sometimes.
On a more serious note, I prefer the time skips. Gives the world scale. A lot of stories feel like they are just weekend trips. Like, you've been fighting the demons for hundreds of years, and some rando demolishes them in an afternoon.
He uses resentment as both food and a power source, but with everything he has invested into Liam, he is suffering an exchange penalty for draining any hate that isn't at least tied to Liam. A few chapters ago he drained an entire planet to mess with one or two people.
The irony is that, with...
Didn't she create humanity for the sole purpose of eventually destroying the world? I could be wrong, it's been a while.
And seriously, that "holy sword" is a real dick move. Take your loss you bitch.