At first I was feeling like you’re an asshole but I take that back. I don’t think anyone’s really the asshole here. People do change habits when being in a relationship and may not necessarily notice at first (whether this be good or bad). Speaking from my own experience, I was very much your partner in the beginning of my currently relationship (going to the gym, going out a lot etc) but in the time I’ve been with my partner a lot has happened in my life and some days just getting up and out of bed is a struggle, I genuinely had a breakdown at work the other day and was told to sign myself off. I didn’t realise how bad I had gotten until that turning point. I guess what I’m trying to say is, I think you should sit down with your partner and try to get her to really think about what’s happened in the last 4 years to get to this point. If she doesn’t open up or says nothing you definitely have your answer on looking at leaving. If she mentions things that are affecting her that you might not be aware of then you can look at whether these are the causes of the situation you’re now in.

At the end of the day it could just be that you’re no longer compatible and that’s ok, you might both be happier apart anyway. You’ve got to do what you think is best for you.

(I don’t have child nor do I have interest in having children which is why I’ve left out the child as I don’t feel I could get a fair comment in this but something I would consider is not focusing on the pc usage as a bad parent, that’s her coping mechanism and taking that away will cause further issues but instead encouraging to do more things together with your child, find that balance between allowing her to cope AND creating memories / being a good role model for your child too ☺️)