he didn't cut his hand to get luke's attention tho? the author literally clarified it on her twitter account, she explained that she wanted to show that andrew because he had grown up in an affluent household, he had never learnt how to use basic tools and once luke taught him how to use them he was able to use them with ease, and those portions were malcom's pov tho the author never brought it up again so thats a loophole for sure, but i just wanted to tell you the author's pov. And i don't personally think andrew has psychopathic tendencies, he is calculative, conniving, cynical sure but all those traits are more defensive for him so as to protect himself as a teen from stalkers, bullies, etc.
i would also want to put into the picture that this clarification post was made by the author after a huge uproar from fans, begging to not turn Andrew into a psychopath after such a great start and development with his character; sooo green flag then suddenly he’s a yandere. the author was going to lose fans/readers if he/she didn’t abandon andrew-is-a-yandere plan, hence the tangible loophole. this incident’s always been so memorable for me (≧∀≦)
Woah...that's an interesting thing. Tbh after his past life incident I was mentally prepared to see a more critical version of himself but he was getting more and more greener by each chapter and it suddenly ended. I was a bit disappointed that his character wasn't explored that much or I would rather say the story was mostly centered around Luke and now I know why it was like that.

Unpopular opinion but Andrew is such a maniac which is very much interesting. Deep down he had all the antics of a psychopath...his past life was quite a hint on that and how he cut his own hands to grab Luke's attention. I was waiting to see what crazy things he does now but ig auther didn't really wanted to go that deep after giving us a glimpse and stayed only in their love nest part.