Nothing has gone wrong

Im trying to work on my thinking about the circumstance that I’ve regained the 12 pounds I initially lost with scs.
My thoughts that I’ve failed and it’s all for nothing generate hopelessness and more failure . I’ve received coaching from your wonderful coaches and they’ve helped me to try see that there is no going backwards only forwards with more info and more understanding. But my belief in this idea is kind of weak. My brain wants to keep going back to the idea that I’ve failed and I ll never succeed now.
Can you help me with some more perspective on this.
My weight has always been my measure on whether im failing or succeeding at life and I really want to leave that mentality behind while still practising feeling my feelings instead of using food to buffer.
Thank you so much for helping me with this lifelong thought pattern.