Quadratus lumborum pain for 2 years, physiotherapist didn't help

[guzowaty]

I've fixed almost all of my issues.
What I've made was to stretch quadratus lumborum for 6 months day by day! This one was the only excercise which I was needed for that:
https://fibretense.com/wp-content/up...0/IMG-3050.jpg
And what is more important I had very tight gluteal muscles and piriformis muscle which no one physiotherapist pointed out! I had to figure it out by myself;/ I'm still stretching these muscles but it's better and better.