So, here's the deal: after 2 years of dating, many women feel as though they have their man in the palm of their hand. Especially if, prior to the weeks of disagreement, things were going a bit too smoothly.
Women sometimes get the false impression that they hold all the cards, and that the man they're with is weak and worships the ground they walk on. In other words, they get the idea that you'd never walk away from them. And yet, they NEED to know you'd be willing to walk away if pushed too far or disrespected.
I experienced this before myself. Things were going great for many months, and then out of no where the woman started to be more picky and argumentative about things, starting fights about stuff that wasn't big deals. Worse, when I would try to calmly sit down and talk about these things and give my honest perspective (since that's what she was asking for), she would balk at what I was saying, constantly interrupt me, and not want to hear what I was saying.
And so, in the middle of one of these arguments, I dumped her. Told her I was tired of this on-going cycle, and I was just done.
At the time, I don't think she actually believed I'd be the one to walk away. But when I did, something in her changed. Now, she was calling up my phone, begging to be able to talk again, asking me what she did wrong, etc. I went a few days without talking to her, letting the messages pile up on the phone and in my email box. Finally, I decided to be open to a conversation with her. In that convo, I told her straight up: I don't care if we disagree on something, I am more than willing to hear her BUT I would not be disrespected and wanted to be heard and understood.
After that, any future conversations with her went much better, and she would actually LISTEN to what I had to say and be more careful in how she talked to me. Why? Because she now knew she could legit lose me, and that I had no problem with being able to dump her and find someone else.
It sounds like your woman doesn't have that thought about you. It may mean having to put your foot down and say tell her where she's messing up. Like, she got mad at you for not wanting to go to her family's place, yet it was her year to go to YOUR parents places and YOU didn't get mad about it, so her being mad is really out of pocket. So, tell her that. And let her know you haven't appreciated these last few weeks, and if things don't change or if y'all can't figure out a better way to communicate that you'll be out. And you have to sound like you MEAN it (and you should mean it).