I... I honestly feel so bad for Marcus. He's been wronged, his love brutally killed, and he's been betrayed by nearly everyone he knew. He just wants Jun to be happy and alive again, man. Like, that's his end goal. And then maybe have a fulfilling life with her.
Tbh that would have been a good motive to make his character more complex, but rn the author's doing him injustice by having him be your average obsessive psychopath. Smh