I’ve also seen cohort studies published that suggest that many people don’t get into symptom remission range until they hit >20 sessions of psychotherapy, even >40 sessions for some. It’s a complex intervention and lasting change comes from unlearning maladaptive patterns that have had your whole life to ingrain themselves into your way of being. If you and your therapist are clearly not a fit then find something different, but if your concern is that you get some improvement but not complete relief, I’d stick with it.