I feel like this is an important point - the shame of "failing" at getting better. I notice for myself that my sneaky sneaky inner critic/perfectionist can come in when a symptom arises and say, "Others have used these techniques and feel better why not me", "I help people with mindbody conditions but I have constant anxiety I must not be using them well enough"... etc etc - all of this pinning of blame on self for not controlling an unconscious process.
These are deeply conditioned patterns of self-hatred and comparison that are rooted in childhood. Patterns like this add to your already overflowing stress and create more TMS. However a critical point of these patterns are that they not our fault, our pain is not our fault, not getting better is not our fault.
We can learn to take agency and start to build the relationship with self that we never had as child. For myself that means unconditional love, compassion, assertion that who I am is enough, building boundaries with others as a form of kindness, soothing myself... all of these teach the brain that I am safe and loved. There are few more powerful balms to breaking the fear cycle than that.
Also, intention is important. Pushing through to do physical activity while terrified of being in pain can hold back healing. If you haven't read Steve Ozanich's book The Great Pain Deception I highly recommend it. He mentions how he forced himself to exercise through any sort of pain, "just grit my teeth and get through it", and how this attitude held back his recovery.
Why? Because bulldozing his way through pain wasn't a form of self-love, it was a form of perfectionism: "I am well so I have to do this, I will not be held back no matter the cost to myself.; I should be able to exercise so I am going to run a half-marathon today even with this back pain."
It feels from previous posts that you may be falling into this camp but I invite you to get curious and examine your motivation for exercise. Is it an act of wellness and respecting yourself or is it a feeling that you have to exercise and are willing to sacrifice anything for it?