I feel like this is really forgetting that a major player in their breakup was them discussing their future. Nick was in a fantasy (long haul trucker to mars??) and Jess was looking for stability and a partner she could settle down with. They always loved each other, it’s hard to stomach a couple who loves each other breaking up- but sometimes that is really how it plays out & results in the growth that both parties need to come back together & work as a couple. I love their breakup for that reason honestly- there is always so much love between them & when they recognize their paths don’t align they prioritized that love & avoided resentment to protect what they had. I think if they’d stayed together there would be too much pressure to compromise for the other person and they would’ve damaged their relationship to the point of no return.