Spot on, that's the big flaw in liberalism. It's never an issue with the system, only communists reason in systems. No, it's just that the guy in charge is bad, and if we could get someone better there, everything would turn out fine.
Let's disregard that ever since Reagan, no president was ever able to slow the runaway financialisation of capitalism, or the concentration of wealth into fewer and fewer hands. Capital has known no major blowbacks in many decades, and it's never been so powerful before.