Was it me, was it them or was it us? You may never know, but rejection isn't the end of the road.
There is always a silver lining in missed opportunities. Identify it and be sure to use it to continue the journey to success.
“What rejection did you experience that turned out for the best?” When thinking back on jobs they weren’t offered or turned down, graduate schools that didn’t admit them, or promotions that went to someone else, all respondents agreed that they were better off in the long run. Although most were initially disappointed, gaining perspective over time helped them realize that those early frustrations afforded them the chance to try something different and to gain valuable insights.
https://hbr.org/2019/07/use-failure-as-an-opportunity-to-reflect-on-your-strengths