The best deal in history has been Berkshire Hathaway. He charges no fees, zilch, only a nominal salary ($100k iirc). If Warren had carried forward his incrediably investor friendly 0/25 deal he'd have ended up being far richer.
His logic is that large fees on top of what can be excruciating fees by PBs are a major drag on realized returns. And given beta is the average, gross of fees, of all the alpha, then it holds that a material drag on the average will cause most active managers to do worse than the market.
Buffett and Buffett charged jack shit. Again, extremely limited.
The important thing he was criticizing was the excruciating fees, I think.
[0] https://www.wsj.com/articles/daniel-loeb-criticizes-warren-b...
He was indeed an activist investor. But he was an activist investor for dirt cheap, doing the dirt cheap things. Same for the use of insurance float (the cheapest money around) for alternative investments (the cheapest ones he could get).
(you could definitely argue that 50 over the higher threshhold is very different tho)
Berkshire Hathaway has B-class shares available that only cost $170. Anyone can afford them. https://finance.yahoo.com/quote/BRK-B/?p=BRK-B
[0] http://www.valuewalk.com/2015/05/warren-buffett-partnership/