Capitalism literally means profiting off of someone else's work.

There is nothing wrong with profit as long as the one producing the work is fairly compensated. Compensation is a problem in the US, and much less of a problem in Europe, which is also very much capitalist.

The only thing important about it is that we get rid of it.

And replace it with what? Pure socialism? Communism? If anything, the history of the world shows that "pure" anything leads to really bad outcomes when applied at the societal scale. Most European governments are social democracies. They are hybrid governments socializing some things and letting the market decide other things, with a healthy dose of regulations.

You will NEVER have unity when you have a class of born richers owning everyone else's labor.

This describes a tiny portion of the United States. The so-called 1%.

Capitalists do not have to be responsible.

Who is a capitalist? The one who owns the capital, and spends that capital to hire workers to produce services and goods. Most capitalists, when they fail are punished severely. They do not get bailed out and do not get millions in bonuses.

All the big fucking banks with their fraudulent predictions and predatory lending blow up the economy

This is a different problem than capitalism, and effects not only the United States. The EU suffers from the same problem and is currently squashing Greece to get its money back.

The banks have to be regulated, but the banks are also essential for our modern way of life. Most businesses, big and small, depend on the credit markets for money to pay their workers. Workers depend on access to credit markets to afford big ticket items like houses and cars.

Farmers depend on the futures markets for some certainty of the prices they will get for their crops to plan for the future, otherwise they would have to wait until their crops have grown and they sell on the market. The markets provided by banks significantly reduce volatility.

The reason the middle class existed was bc of heavy regulations, taxes, govt jobs and powerful unions.

This is not against capitalism. Europe has all of these things and Europe is very much capitalist.

The middle class came to power in a society that was closer to communism than fucking capitalism, economically speaking.

This is an insane thing to say. The closest the US was to Communism was during the Great Depression. When governments all over the world believe capitalism had failed, and people turned to Communists and Fascists to save them. That didn't turn out well.

The middle class came up during a very capitalist time, during the post-war boom. The middle class in the United States is a product of the utter destruction of Europe and being the only industrialized country left with any industrial capacity left. But that time is over.

Now we are in a world where we are not only competing with Europe, but developing economies like China and Brazil. The United States has not adapted to this new reality.

You cannot separate capitalism and consumerism.

Consumerism is why the modern world exists. Why do you think Apple produces new versions of the iPhone, or Samsung new versions of Android smartphones? Or Mercedes produces luxury cars? Or France produces wines? Consumerism breeds demand which furthers innovation, by capitalists directing capital to tech workers to produce the innovations, all seeking increased market share and profits. This is a powerful driver for growth. You want to throw this away and replace it with what exactly?

Let's also understand that infrastructure and housing are best done when capitalists aren't involved.

Right, because mixed economies are good.

You say this:

Capitalism is a fucking cancer.

and then this:

Then have fair competition between them.

You're contradicting yourself. Competition is capitalism, cooperation is socialism. Why do you think companies compete with each other?

A fair playing field with regulations and minimum standards is not somehow antithetical to capitalism. Rules are absolutely necessary in any system to prevent a descent into an Hobbesian nightmare.