The CIA has definitely committed some pretty heinous acts, but the only reason they appear worse than your average national intelligence service is that the US has a habit of declassifying operations and documents after they're no longer active and/or relevant, forcing them to confess to a subset of their crimes. Most national intelligence services are allowed to freely and happily cover up the vast majority of their crimes indefinitely, and there's much less opportunity to hold them accountable unless they actually get caught.