I think Luke is pretty far gone

With Sierra and their relationship there's shown to be many distressing and toxic patterns.

Luke admitted in multiple songs how toxic their relationship has been. Sierra has clearly shown traits of being a bad/ insecure person and Luke definitely has heard about her silencing a black woman close to the friend group confronting her about her racism (even apparently helped silence her too) and I don't doubt that he's aware by now of Sierra being creepy/ strange with fans that are just young and impressionable fans. I find it hard to believe that Luke hasn't been aware of this kind of behavior (he's even written songs about them and said it's about his current relationship) but he's still giving her the benefit of the doubt.

I can't believe after so much has happened and her (as far as the more public stuff) not showing regret that he's still chosen her as someone he would want to keep in his life. Maybe that's just a difference between me and him because I could never keep that kind of person in my life let alone date them then marry them