Yarn has a knot
While knitting I ran into a knot in my yarn. What should I do? And is a yarn company inferior if I find a knot in my yarn?
When this happens, just cut the yarn before and after the knot and re-join the ball to your work.
It is not a sign that the wool company is inferior, it is just something that happens at times. It is usually disappointing and I have come across a knot at the worst possible point before, but it is just a normal part of hand knitting.
You could argue that the company could have better quality controls in place, but not even the best manufacturers can completely eliminate small errors like this. They catch most of them but a very, very small percentage of faults can and will slip through the most rigorous quality checks.
And if you keep knitting long enough you are likely to find a wool break even in the balls produced by the premium wool manufacturers.