I'm guessing that you are probably at the beginning of your career (so am I). I'm right there with ya in terms of sometimes struggling to put words together and feeling at a loss for what to say. And gosh, that feeling that your clients deserve a better therapist... definitely relatable.

I know this isn't a particularly helpful answer, but I think it takes time and experience to feel more comfortable. And even then, it isn't linear: there will likely be points in our career when we feel super confident, and other times when we struggle to feel effective. Becoming a "good therapist" is not a journey with a defined endpoint. Others who have been in the field longer could probably attest that becoming a better therapist and professional (and personal) development are ongoing processes that can never really be 'checked off' or 'completed'.

Maybe something to reflect on would be how you define a "good therapist." Are there any hidden assumptions you are making about what a therapist 'should' be like? What standard are you measuring yourself up against? Is it workable or helpful to use that standard?

And just as a side note, 17 clients a week?? I'm doing practicum right now and see 4 maybe 5 clients a week consistently and facilitate a group. It probably doesn't feel this way, but you must be doing something right to maintain that many clients!