Bro, your 2nd point proves you weren't paying attention at all.

Arisu, Karube, and Shibuki all at first wanted to survive the 7 of Hearts game- Even though they were trying to convince themselves they could find a solution, the reality is their first priority was being the one with the wolf status just in case. In the manga, this even happens with Chotta too.

After contemplation however, they all decide they would rather die for their friends than live with the guilt and thus they all make desperate attempts to Not be the one to live Including Arisu. In the final minutes of the game, Arisu does everything he can to Not be the survivor- he just fails.

He then goes on for days living with survivors guilt and even says outright in the distance game: 

'Sacraficing someone else so I can live- I'm never doing that again.'

This is called a Character-Arc.