Many hedge funds have gone out of business due to a loss of investor interest. Or so-so performance that failed to attract followers of the past.
The main peeve against them are their charges. In addition to their standard management fee which is usually set at 2% of assets managed, they still get about 20% of earnings they produce. That is far too much for funds doing conventional, non-rocket-science investing.(See the Earl J. Weinreb NewsHole® comments and @BusinesNewshole at Twitter.)