When you really internalize the fact that the stuttering is not your fault, it helps. Other things I look back and cringe on are usually bad choices that I made. Stuttering isn’t a choice so it doesn’t reflect on who we are as people. Improving fluency is a long and sometimes gruelling process, your still going to stutter through that process. It doesn’t mean you aren’t working hard enough or not progressing quickly enough. It also helps to remember that we think about our own stuttering so much more than anyone else does. When you cringe thinking about that block, the person who witnessed it already forgot about it. Stuttering feels embarrassing but it’s not embarrassing.