Socialism

Right, in a sense I'll give you some points, as the current left (as in the parties, not the theory) is too disorganized to propose a viable alternative economic model. However, your entire comment comes off as rather disingenuous when it comes to arguing why "Capitalism can't be changed".

You can kick against capitalism all you want, god knows there are good reasons to, but you will never replace it with anything better. If you think life was good during primitive tribalism times, you should only be forced to try it and see.

An alternative to capitalism doesn't mean we go back to monke at all. When looking at things historically, such as the Roman Empire or Feudalism, people didn't live in tribalistic huts or whatever. Technology gave us the ability to build houses, to harness the power of electricity - not capitalism as an economic model.

I’ve seen parts of the world where people currently live in partial cardboard boxes with dirty mattresses as their only furniture. They still live as if the are not part of the modern world. And it isn’t pretty, life there is harsh and the reality of subsistence is extremely difficult.

This has literally nothing to do with Capitalism, but rather just with a country being poor or without proper government/order, though it's way more complicated than that and I'm just simplifying. Also, there are countries in the world under Capitalism who are still developing and have people still living in the conditions you describe, such as in India or parts of Southeast Asia/South America/some African countries.

We kick against capitalism because we want to be moral warriors, but in truth we get a lot from our capitalist way of life; great food, good housing, nice furnishings, a place to hang out hat and plenty of leisure time. Just saying, it’s not all bad, and it’s really better than the alternatives.

First of all, criticizing something bad and/or wanting it to change doesn't make you a "moral warrior", by that logic a cancer researcher who tries to think of a cure is also a "moral warrior" which isn't true. Also, you do realize that in most capitalist countries, things such as "good food, good housing" that you describe are only accessible by middle class people and above, right? If you're poor (which is the majority of people under Capitalism), you might not be able to afford such things or be constantly at risk of losing your housing or whatever. Proposed alternatives such as Socialism have a lot of support because it often aims to bring these things (as in, stable housing, food) to more people when compared to Capitalism, so if you think that

Also as an aside, a very influential author who also stated that "Capitalism is the endpoint there can't be anything better" was Francis Fukuyama, and he wrote a book in 1992 outlining just that. However, even he has changed his views since.

Sorry for the wall of text and if what I write isn't clear - English isn't my first language.