If you think that sounds like "Žižekian nonsense", then you obviously don't understand what Žižek argues, because he clearly doesn't say anything silly like "human ideology" (or "Žižekianism", for that matter). The article you posted also does wonders completely breaking down Žižek as an abonimable human being - while not truly engaging with his ideas. It is pretty worthless, takes things deliberately out of context, and, after rigorously defining him as a persona non grata, invests no proper effort to do what actual communists like Marx and Lenin did - acknowledge that even enemies like that can give contributions to understanding, and things to learn from and work at doing so.
Does he sometimes spew bullshit? Absolutely. Does he believe in "human ideology" or spout anticommunism on a worse level than The Black Book of Communism, as the article wants to imply? Only if you deliberately misread and misinterpret him.