As a teacher, and, most importantly, "former" pupil, I'd say this: you will probably never get to the 100%. Not even close.
Many professional and acclaimed musicians wouldn't say that they got their "one hundred percent" on anything. Ever.
A known quote by Pablo Casals, considered one of the greatest cellists of all time, was the answer to a question about why he was still doing 6-hours practice everyday, even at 80 (that was his age for the last verified quote, but some report the same even when he was 95).
His answer was, more or less: "Because I think I'm [still] making progress".
The fact is, your expectations are constantly increased by both your progress in specific skills and your experience in life.
I don't know your teacher and her/his method, but as a guess I'd say that your age might be an important aspect to be considered.
The learning curve of an adult is radically different than that of a child, teenager or young adult. The more you're younger, the faster you learn radically new skills (you're a blank slate, new things are much more evident and usually written in large characters), but this doesn't mean that your learning is slower at later age, as the experience acquired in adulthood can potentially make you learn new skills even faster.
Unfortunately, experience is also a big drawback: it tells you to avoid trying things because you "think" they're not worth it, or to believe that they won't do any good, and that's not always fine - especially for art related subjects.
Consider yourself lucky: you can still realize that you're not getting good as you wish (most adult people is not able to do that, for any new skill or knowledge: consider the current problem of disinformation and spreading of fake news on scientific facts).
I had experience with adult beginner students, and I have to say that's not easy: you have to continuously fight between giving satisfaction while keeping interest and providing useful knowledge, and, most importantly, you have to face that you're not teaching on a "blank slate". On the contrary: you got an already filled slate, with very few space left to write, and lots of (possibly incoherent) data, in which you have to find space to write things that consistently correlate to what is already there and that is probably impossible to clear out.
As others already told you, you should probably openly speak to your teacher, let her/him understand your doubts and ask about her/his method.
But, in any case, don't expect final results, even from "simple" books normally aimed for children. If you had the opportunity to actually listen to children having lessons with your books, you'd probably hear lots of awful noises. But those children would be normally "fine" with it, as their teachers would say.
That's what learning violin (and many instruments, not only stringed ones) means.
Be patient, tuning is one of the most important and hard aspects in violin. Professionals struggle with it even after decades of studying. For instance, you could see the latest posts from Hilary Hahn, a world's leading violinist, who is publicly struggling with tuning (amongst other things) while studying forced at home in these very days.
You can only get it "right" from experience: both from practice and listening; and that's the fact: you only get practice experience by playing, while you can have listening experience even if you never played in your life, and that's probably your case; beginning to play with an instrument at young age means creating a "parallel learning curve", so your expectations are not as "big" or "defined" as the limitations to those expectations and beliefs as an adult (professional or amateur whatsoever).
A child can truly believe to become an astronaut.
An adult usually thinks it's impossible, and hardly dreams about it - but maybe still can.