Maybe the problem isn't the economic model.
But yes, if you want to participate in a socialist revolution, make sure your movement isn't taken over by fascists.
Life is built on competition, life pits all participants against one another. Resources are not infinite.
Main point is that humans are intelligent and we can choose where and how we compete or if we don't want to compete at all.
Holocene extinction is mainly because humans collaborated in much better way than any other animal can. Life might be build on competition but we see how powerful collaboration is.
That there's always been hunger in the world, even when we didn't produce more food than needed tells you production of food is not the resource limiting the distribution of food, other resources are. Even with all the imagination and collaboration of every communal government in the world to a scale never seen before in history, hunger is still a huge problem, because food is not the only resource, everything is a resource: time, interest, emotions, infrastructure, goods, distribution, people, communities, everything, and they compete with one another for our time and attention.
Everything is in competition, even your ideas and mine right now, and that's a good thing, but the first step to try and better our situation is to accept the reality of the natural world and not fight against it.
Its why people are so miserable en masse, hostile, and chomping at the bit for targets to attack and hate. Its worse in America because theres almost no socialism at all to raise the floor of society - the country is buried in homeless and something like 1 in 5 persons is food insecure (probably higher now in the pandemic). If you fail in "winning" at capitalism to some degree you are supposed to feel fortunate shelters and soup kitchens exist. Sometimes. Society has broadly rejected them as the socialism they are and underfunds or destroys them where able.
Its also why drug addiction is totally out of control. Desperation and social isolation by our culture creates whole populations of people to be exploited by drug profiteers. Many other nations don't do this by catching people before they get that despondent or miserable and by helping (rehabilitation) rather than hurting (prosecution) those that get that bad.
The process is cyclic. The desperation feeds into the hate feeds into the predation feeds into the exploitation feeds into the desperation. But breaking out of it requires class consciousness that is opposed at every level - at the bottom by the animosity and inability to trust and at the top by the profits and power reaped through the harm done.