And I take it that solution is Marxism? Either way, a take I 100% agree with.
There are more types of anti-capitalism than marxism. If you've ever interacted with socialists, you will know we all hate each other and we all think everyone else isn't a true socialist. I fall close to anarcho-communism myself, but there are other types where for example a free market is maintained, but means are owned by the common. Capitalism is the use of privately owned property for manufacture and creation with the purpose of reaping monetary profits, so there are a number of ideologies opposing it. Marxism specifically proposes using a "dictatorship of the proletariat" to create a socialist society and then slowly allowing that structure to wither into a communist society, which refers to a moneyless, classless, stateless society. I disagree with that notion heavily and borrow ideas more from Kropotkin, Bookchin and Graeber myself, but Marxs economic ideas are surprisingly sound still today.
I'm not sure if Marxism is the solution, I think that Marxism is incompatible with human nature as most people are greedy, selfish and self-interested. These qualities thrive under capitalism. Most people are only looking out for themselves and don't care about anyone else, which is why I believe that communism will fail because no one wants to take one for the team. I'm not sure if there will ever even be a viable alternative to capitalism. There's a philosopher named Mark Fischer who has a theory called capitalist realism, where "it's easier to imagine an end to the world than an end to capitalism".
Kropotkin was a anthropologist and biologist, who wrote a book disproving that notion of selfish humans. He found a shitton of examples within animals and humans, where people cooperating with each other happened naturally and was to their benefit. Elinor Ostrom also won the Nobel prize for studying social structures, by which people were able to share resources fairly without greed or envy. There is an entire field of mathematical research concerned with fair and envy-less sharing, called fair cake-cutting. I could really go off more. The problem really isn't humans, but capitalism and anything associated with it (the state, enviromental destruction, bigotry, etc.).