The only improvement I saw was once I accepted my speech. Anxiety can play a large role in stuttering and the "accept your speech" discussion can come from an honest-good-faith attempt to reduce anxiety and therefore, improve your speech. I still stutter, but it's in no way a massive barrier in my life. I still have a lisp, but it doesn't matter - why? I learnt to accept it, and then my social performance became less focused on it, other people paid less attention, and it reduced. It's absolutely fine to complain, but there's a difference in complaining and being fixated on negatives - "just accept your speech" is seeking to distraction from these negatives. There is also a larger political motivation sometimes: why do we have to constantly strive for fluency? Why can't we create a space in which stuttering is more broadly accepted as a speech characteristic? In short, why does stuttering have to be constructed as a disability? If the rest of society were less weird about it, it wouldn't be as hard to get by - step 1 to that is accepting it yourself, and then showing others that it isn't a big deal.