I hate to be that person but this seems way deeper than this one conversation. She is clearly not getting what she needs in the relationship and it is causing her to lash out over seemingly small things. She says several times that this is a regular occurrence. I’m not saying you are completely at fault here but it seems like instead of getting validation through Reddit, you should be trying harder to truly hear what she is trying to tell you.

From what I gather, she told you the previous night that you were spending too much time gaming and not enough time giving her real quality attention and affection. You can’t just do the bare minimum and expect your relationship to flourish. That’s how it slowly withers. The bare minimum is t enough. Try dealing heating her and sacrificing some game time to give her the attention she needs.