Advice for getting through a mutual and amicable break up where no one was really in the wrong

Hi all, I am going through the hardest break up of my life. I have nothing bad to say about my now ex and we both tried so hard to make it work. It was a case of two well-intentioned, good-hearted people that wanted to be together more than anything, that still ending up hurting each other. We just weren’t the best fit and small things added to making each other unhappy. I am entrenched in guilt and disappointment and frustration and heartbrokenness over how this was turned out despite so much effort on both sides. I am especially blaming myself because I remember all the unhealthy and toxic ways I dealt with my insecurities and upset in the relationship. Despite the fact that I turned it all around before the end, I blame myself and tell myself I brought us to this demise. I am in great need of advice from all others out there that have been in these similar shoes who could shed some light on how I could possibly move forward? Thank you everyone.