Unfettered capitalism doesn't remain capitalism for long.
As soon as we allow unfettered capitalism to exist, business interests begin to fetter it, with monopolies, price fixing, tainted foods shoddy merchandise and it is no longer capitalism. Regulation is to keep capitalism alive and well; unfettered capitalism means to destroy capitalism.
Unfettered capitalism is similar to the name: monopolistic-capitalism, or uncompetitive- capitalism.
All you're saying is that democracy is inherently corrupt. True, democracies will always devolve into socialism/fascism. That's a problem with democracy, not capitalism. Monopolies can only exist if government enforces them by law. "Price fixing" has never worked unless enforced by law. That's what FDR tried to do with the NRA. It was all a vast price fixing scheme.
Companies that sell tainted food can be sued, and the ones that shell shoddy merchandise go out of business. Where do you find shoddy merchandise, in capitalist countries or socialist countries. If you want a perfect example of shoddy merchandise, check out the cars they made in the Soviet Union.
All your claims are Marxist anti-capitalist propaganda that was shot down long ago.