Struggling with my therapist for BPD treatment

Hello! I have BPD along with BP2 and ADHD. My BP and ADHD are under control without therapy (just use meds) but BPD is a different story. I’ve had 3 different therapists throughout my mental health journey and my current one specialized with BPD and practiced DBT with his patients. I joined a DBT group ran by him and the whole experience was amazing. I felt I finally found the help I needed. It’s been 18 mo now and I’ve stopped the DBT group because I began to hate it and felt it wasn’t being ran well and I was no longer learning. I’ve been feeling indifferent about my therapist as well. I feel less comfortable opening up and his input tends to rub me the wrong way. When I ask him specific questions I feel like he is not actually listening and answers on auto pilot. He is also on the older side and due to this I often feel misunderstood. He has helped me so much so I don’t understand what changed. Any advice for this? How many times have you changed therapists and how do you know if you need to change or just try harder?