Liberalism is the ideological component of Capitalism. It supports things like private property and whatnot, so Capitalist ideologies typically fall under its umbrella.

Leftism is a broad anticapitalist categorization of ideologies like Marxism and Anarchism.

What you describe as "everyone" is the more progressive side of liberalism, but not leftists. Leftists go farther and say that to fix those issues, we need Marxism or Anarchism, generally.