Whether you can beat the market depends on which market, what time, and you. I've been beating SPY since 1984. I have tweeted all my trades before I made them since June, 2019, @RandomFour
SteveAlexander, you've got a new follower on Twitter . @Abubble , if you define "the market" as simply the S&P 500 or DJIA30, US stocks averaged an annual gain of around 9.5 % incl. dividends reinvested in the last century. Most money managers failed and will continue to fail with their mission to outperform this leading index for US stocks.
However, small retail investors can potentially profit from small moves because liquidity of markets is in most cases a non issue, while bigger positions might move the underlying one bets on and cut into profits.
Buffett has a multibillion enterprise to manage, look at how long it took for him to build up a huge position in Apple for Berkshire Hathaway.
My favorite market wizard, Tom Basso (interviewed as "Mr Serenity" in "The new market wizards" in 1991), will book 2020 as his most profitable year percentage wise thanks to big trends in underlyings as diverse as stock indices & oil, but generating returns of 10% or more year after year is very challenging without a doubt.