Home Depot employees stealing from back gate doesn't make Home Depot corrupt or rigged. People always game the systems for their own enrichment.
Saying the market is rigged is too broad a brush, when it's the players gaming the system.
It's shitheads like hewhoshitsinpants and orlando his puppy creating spac dwac shares out of thin air, getting willing losers to be first investors and funders and then selling their phony stock on the open market to more losers thus directly pocketing the investment/funders ipo money. That's rigging the market system, not the whole market. Just their invented sector.