I wonder who those critics were and what they were motivated by. (Rhetorical)
We can play the “whose saying it game”, or look at the arguments. Democracy is rule by the lowest - and it’s easily manipulated by the popular. Buying votes, focus on the carnal, and immediate is a clear sign of democracy in decline.
The US founders didn’t believe in democracy. More people do today, mostly out of a sense that it’s moral obligation. Very few actually will argue it leads to better government outcomes.