There are not many daytraders & even less successful daytraders.
https://vantagepointtrading.com/whats-the-day-trading-success-rate-the-thorough-answer/
What’s likely getting you mauled is hedge funs coupled with large institutional clients. Maybe it’s just semantics but a fund is run by a fund manager that trades consistent with the fund guidelines. A brokerage firm executes the trades. Hedge funds use prime brokers who have access to large institutional investors such as pension funds & commercial banks that have access to large sums of money to loan on margin. It’s why spreads & liquidity are so important.
If you possess the ability to track price & volumes, you can beat the large institutions trying to execute large positions both on the upside & downside. You should almost always beat the market by having tactical agility because your portfolio is small compared to what they’re trading. If you or your financial advisor is not doing this for you, fire yourself and/or get another financial advisor.