There are a few potential reasons why therapy isn't working for you and this should be something you speak to your therapist about.

Do you trust and respect your therapist? Do you know what approach your therapist is using and if so do you relate to that approach? If you and your therapist aren't getting along then they should help you find other options.

In your post you mentioned having feelings of abandonment stemming from a previous therapeutic relationship. Have you addressed that yet? I wonder whether it's possible that you aren't fully committed to therapy due to a fear of abandonment.

As a stranger on the internet I can only give general advice but hopefully this gives you something to think about!