This gives an entirely wrong impression of what actually happens.
The vast majority of retail traders trade through brokers and probably 95% of those 95% who lose actually lose to their broker, who is their counterparty. They do not do transactions directly with other investors.
Even with ECN, the trade is passed through to a liquidity provider who is usually a market-maker bank, not an investor.
Yes, indeed, retail traders lose because of a lack of patience, a lack of knowledge and a lack of experience- and a lack of other things, too.
But they lose because of their own inadequacies (which can be rectified), not because they are beaten by the superiority of other investors. You do not need to be better than anyone else in order to succeed - you just have to be good yourself. That is the beauty of trading such markets, we are all on the same side.................