Yes, I get the idea of it feeling like a struggle. I don't know enough about the treatment to comment, but I am aware that OCD brings a lot of uncertainty and doubt. I do know for sure that God wouldn't want you to struggle on your own. Keeping your main focus on Him is important for healing. If you ask the Holy spirit to guide you to the right treatment and therapist, that will happen.
God does not want you to suffer. Our OCD brains introduce intrusive thoughts that we don’t have any control over and since ERP is the gold standard, you are doing nothing wrong as it is meant to help you get better. God gave us ERP - and that is the way to a better and healthier life so that we can focus on what is pure, lovely and honorable. I hope this helps.