My wife is off with long term mental health issues and the treatment that she gets is shit (except our GP who was amazing and probably saved her life)
You can’t be in a queue for treatment while being treated. So if the current treatment has been determined to not be working to improve things then you stop that treatment and go into a queue that’s at least three months for the next treatment. Even if the treatment that you were having was helping you stay relatively stable and stopping it would be bad.
Also, if your treatment is a fixed term thing that comes to an end at a known time you have to wait until it ends before joining another queue.
We moved house which meant that we had to stop treatment and go into another queue. Eighteen months later and we’re still in the queue and realising that the shit service we were getting before was pretty good in comparison.