Earlier quoted context omitted.
Being able to find where you are on the risk/return and growth/income spectrums is not hard enough to merit the hundreds of millions of dollars in fees. For whatever strategy you want, find the corresponding index fund with that strategy, and it will probably have done better after expenses and will have more liquidity and less volatility.
Generally there is a small annual fee in addition to a cut of the profits. Profits on huge gaining years seem really high, but you're forgetting the essentially zero profit (or losses) on years with negative or no returns. Those years are not necessarily (and in reality, not at all) the fault of the hedge fund. They still provided a very valuable service in down or break-even years. Also, managing billions of dollars…
But the real issue is that there is no convincing proof that active managers can reliably out-perform passive investment strategies over long term.