I think a lot of people get caught in the concept of being a Yandere. From what I remember everyone seems to want a Yuno Gasai but there's very few who'd ever wanna be her. I find that void she experiences when becoming god, I think I relate to aspects of my life quite a bit. I remember growing older with these obsessive tendencies just like so many of you in the Yan space.
I experienced the lowest I ever felt right before meeting my partner. I remember everyone in my life was treating me like I was something to be ashamed of or felt like I was too much. It's just an earth shattering reality to feel like no one is there and no one understands. I think that's why there's so many who love the idea about someone sentimental enough to ever so desperately cling on to life the way Yuno did.
I remember that after her and Yuki's moment, she broke down saying she wasn't asking for very much. That she just wanted to be with him, it tore her up inside to thinking of having to kill him again just to be able to pretend to be with him for the brief time. Her death scene broke the hearts of everyone I ever showed the show to. I feel it too, you didn't deserve to hold all the weight on your own Yuno, Neither did you Yuki.
I'd always put you guys together because it always made me happy. Before you sensationalize her unhinged behavior, remember the love that's at the center of all of it.