Cherry picking an article seems to suggest the US has similar problems https://www.investmentzen.com/blog/average-401k-return
Australia's superannuation has improved over time. For example, the MySuper reforns led to consolidation and an exodus of underperforming funds.
A quick search on some of the biggest super funds in Aus shows returns of > 9% in a more equivalent, potentially volatile "high growth" fund.
There are funds that offer lower cost index-tracking products if that's your thing.
The biggest problem, IMO, is financial literacy which needs to play a bigger role in education.
Where do you suggest people invest their long term money to avoid the scourge of coke bros? If one is to believe the stereotypes, real estate and non-Super investments seem just as likely to face the same problems.