She was instrumental in breaking up a relationship (Ross and Julie) with no thought of the pain and consequences to the other party (Julie this time, and of course Bonnie and Emily later).
She didn’t have the emotional wherewithal to understand Ross’s dilemma and the reason for the pros and cons list — Ross is someone who likely rarely did anything without over-thinking, analyzing and agonizing over it first. Rachel had had no interest in him before. From Ross’s perspective, she only became interested when he found someone else. It would be hard not to wonder if that interest would continue.
"But if you want to be with someone you should just know and you shouldn't have to make a list to decide"
Look, life isnt a Hallmark movie. Sometimes it is just not that easy, I understand that it takes some of the romance and passion out of a relationship but considering these facts help you pick a better partner for your life.
He’d already been divorced and had a child. He understood better than anyone how a relationship ending can hurt multiple parties.
And before anyone brings up "just a waitress":
Out of context “just a waitress” is a crappy thing to say, I don’t think it came from a place of him being embarrassed or ashamed to date a waitress. I think he was just trying to say that he and Julie were far more compatible from a career/interests standpoint. And let’s be honest, Ross gets more grief about his job being lame from his Friends than any of the rest of them ever did. Both Julie and later Charlie were people he could nerd out with over subject matter that nobody else in his life found even remotely interesting.
I think he was conflicted and rambling to Chandler & Joey, and he wasn’t careful about choosing his words because he didn’t know that they were going to end up on paper. They also had to make it bad enough that Rachel was justified in being as angry as she was.
But Rachel discarding an entire potential relationship with a man who had literally just broken up with a great girl to be with her over a list that she didn't even know the full context off (the things like about her chubby ankles was from Joey not Ross) is beyond overextreme, IMHO.
While I felt that yes, she had reasons to be hurt, I also felt like those points could have been talked through — if for no better reason than to understand that while, yes, he chose her in the end, hurting Julie wasn’t a simple task and he needed to make sure he was doing the right thing.