"Outperforming" here means extracting as much wealth as possible and consolidating it in the hands of a few. All the while being an absolute detriment to the health of the environment and people it uses to extract said wealth.
Criticism of Capitalism is big business. Being against big business is big business. Laying out an actual plan to abolish the ability for massive organizations to leech off of the majority of people is much more difficult to establish as a stable market commodity.
now now, don't upset dollar democracy, how else can we change the world if we can't buy it in the market? All alternatives, nicely packaged to be found in the market.
Hey, I'll get behind any new system proven to work. Issue is, all the currently active systems are just variations of older ones, and Capitalism is simply the best one we've had so far.
Any long-running system that in most instances makes the lives of most ppl better.
I can't say I've done extensive research myself, but when a huge majority of people knowledgeable on the topic say the same thing I'm inclined to take their word for it.