Buffet's said he was unhappy that apps like Robinhood let regular folks trade without paying a fee. Well, golly gee! That sounds terrible. I guess he thinks trading should only be for people like him who can afford to pay big fees.<p>He also doesn't like that everyone can participate in the "gambling" aspect of the stock market -- something from which he's profited greatly.
tldr: Robinhood got offended that Warren Buffett and Charlie Munger called their company out for incentivizing gambling and not investing... which seems particularly obtuse since Robinhood makes their profit from the r/WSB community and not the people who use their platform for long term investments.