This chapter with Ruri's breakdown is one of my favorites. It's so raw and emotional, truly the climax of all her emotions bursting at the seams. I still cry reading it.
Arika is 100% in the right. People who've never been there don't get how substance abuse and addiction ruins your life permanently.
Being jobless is certainly not something pretty, but someone in Ruri's position definitely still has a long life ahead of her and can deal with that, especially with a proper support network like she has. But once you're addicted to drugs, even if you go to rehab and make it out okay, it's still a lifelong struggle not to relapse, your body is permanently changed, and the more addicted you are the worst that gets.
Honestly I really like how this manga portrayed the subject of drugs and how that subject intertwined with all the idols involved.
Just a shame that Arika was curb stomped again and again by everyone around her.