Guys, do you think I should leave the speech therapist that It’s been a long time without any improvement?

Guys, do you think I should leave the speech therapist that It’s been a long time without any improvement? Guys, do you think I should leave the speech therapist that I have been with for some time and I haven't did any improvement in speech even though I can say that he is the best speech therapist in my country, even 6 months and it's fully 2 years since I started therapist, what do u think i should do? Give me any opinion guys