Artifact farming never ends

There are too many characters I want to raise, so I feel like I'm just farming materials and running domains forever 🙄 It's been almost a year, so they should really add more ways to get artifacts by now... 🤔 Also, why do the substats always roll into DEF? I'd be happy if it was a DEF-scaling character, but it's useless for anyone else, which is a pain 🤔