The correct benchmark for a hedge fund is T-bills, not the S&P or the Nasdaq. That's because hedge funds are an
absolute return product that offers an income stream uncorrelated to the market.
This may sound counterintuitive, but it's the basis of modern portfolio theory. The price that an investor should be willing to pay for an investment has to do with its beta to the broader market.
Think of it this way, imagine you could access the S&P 500 in a parallel universe. It has the same return characteristics as the normal S&P 500, but in any given year moves independently. How much does this improve your portfolio? Intuitively you'd think it's not worth anything. It's only as good as your current investments, so what's the point.
But in fact modern portfolio theory tells us that it's a huge improvement. Investing 50/50 in S&P and Bizarro-S&P, substantially improves the amount of return you can access for the same risk. That's because the two diversify each other, and the blend either reduces risk by 30% or lets you leverage up and increase expected returns by 30%.
You're saying, "maybe Melvin isn't a good investment, because it seems about equal to the S&P". But the point is an investment that's about equal to the S&P, yet uncorrelated to the S&P is massively valuable. Even if it has big drawdowns, you typically don't care as long as those drawdowns tend to occur during times when the rest of your portfolio is doing fine.
This is the same reason that a 60/40 stock-bond portfolio has massively outperformed 100% stocks historically. Even though bonds themselves return less than stocks.