Just going on whats in the article

"This revision attempts to implement something that has been deemed illegal in the EU and the United States. The only country in Europe with a roughly equivalent law is Russia," said Yen

"I think we would have no choice but to leave Switzerland," said Yen. "The law would become almost identical to the one in force today in Russia. It's an untenable situation. We would be less confidential as a company in Switzerland than Google, based in the United States. So it's impossible for our business model."

Isn't Russia known for censorship in surveillance?

The US is better than Russia and the US isn't exactly setting a high bar