Everyone hating on Tarou. I think the reality for Tarou is much simpler: his first priority is still helping Ririsu get rid of her ability to see first love zombies.
The only way to get rid of Eve is to get together with Ririsu, except he doesn't believe that Ririsu loves him. He believes that...
This is already Rudeus' second life. He's gone most of it so far being grateful that he's got a second chance at all - dying as a result of divine intervention isn't anything special to him, because he knows that he never deserved a second chance to begin with.
I think you may be undervaluing...
Ranna's thought process is probably that she'd like to clean up before meeting Rokudou. After all, she's been lost on the mountain for ... quite some time.
Why is Shirogane so good at this oddball dexterity game stuff? Is it because the Shirogane family is actually a line of circus clowns or something? Are they genetically predisposed to be impressively good at circus performances and hilariously bad at normal activities? Imagine - what if...