you literally have no idea what you are talking about. Not in a hyperbolic way, but you actually have no idea.
Magic secrets? Are you nuts? It's not magic. It's not "stupidly complex algorithms". It's simple. Is there something complicated about buying a stock when it's value is less than the cash on hand (minus all debts owed) by the company? It's like buying a wallet with $100 in it for $50. Things like that happen in the stock market. It isn't common, but it doesn't have to be. I'm not trying to be correct on 5000 different companies, just picking and choosing the drastically mispriced ones.
You also seem to have no idea what a mutual fund is and how it functions and what active management means. It means fees. It means the investor spends something like 1% or 2% of their cash per year for the honor of having someone else invest it for them. Sounds great.
You really need to read some good books. I recommend starting with
The Intelligent Investor by Benjamin Graham. It will blow your mind. He likes to use the analogy of buying a dollar for 50 cents. If you keep doing it, over time you will have a lot of dollars. But he also points out that many people just don't understand and you can tell them over and over and over and they will just never get it.
Is it a coincidence that all of Ben Graham's closest pupils have made a killing in investments the last 50 years? Was it all luck? They all had slightly different variations, but the same basics. They worked in different areas and sectors, yet consistently outperformed the market. It still works today. Why? Because it's against human nature. People are stupid animals and make dumb decisions like buying lottery tickets.
By the very definition, "active" guys can't destroy value investing long term. It's too slow and boring and they can't do it because nobody would be willing to pay for it. Active managers are in the market of generating business, not generating superior 50 year returns.