Totally irrelevant, they don't live in America. Further, their system is different they have higher taxes, etc etc etc.
In addition, the point is Europeans understand how to rise up and demand change and they regularly get it, while Americans sit back and do nothing.
All throughout Europe you see this. Massive protests/strikes that cripple the country in order for the workers/students to get what THEY want. They fight back against things they believe unfair or unjust. They understand they collectively have that power. Americans lack this understanding and unity.
Also, you can use the same argument - they or we don't know how good we have it compared to Somalia or Uganda. Just because there are worse places in the world doesn't mean they/we shouldn't demand/ask for improvements.