TLDR: People who criticize capitalism are still using it and benefiting from it more than they should, hoarding resources more than their essentials.

I see a lot of people online who criticize Free market economies without thinking about the people who make it work which is them.

If people collectively in masses had stopped buying luxury items for example that industry would die out in a couple of years, apply that to any other industry (with the exception of necessary ones like medical industries) and the same results is expected to happen. why do people do not do that and kill the bad industries you ask, because they are in need of Free market economy and it's results.

It's like people who are looking to change from free market economy like to think of themselves as week enough to not be able to change it but strong enough to hate it, while in reality they are strong enough to change their economic system but week enough to not think about the problems in other economic systems. I think that most believers who think that the world is making a mistake by committing to free market economy are people who believe in idealistic values without looking at the science or history of application.

Most popular figures in the modern age who associate themselves wirh other economic systems, don't bother to even try to apply it to their lives and a lot of them are very rich with millions of dollars(Example: Bernie Sanders networth is more than one million dollars).

I fully understand that everyone dream of a better world where everyone in the world has good food, healthcare and education, but sadly that is impossible and the best that can be achieved in real life is to collectively have a system to support the people who need help in hopes of making capitalism easier on them.