But government can't take off Telegram, for example. Despite they tried multiple times. Source: https://en.wikipedia.org/wiki/Blocking_Telegram_in_Russia And thanks to Telegram, people in Russia could find non-propaganda sources, even when Russia blocks them.

VPN helps too. A lot of people use it.

While Putin has money from oil and gas, he could sponsor war and destroy protests. Let's take away them, stop or reduce buying oil and gas. Regime becomes weak and Russian people could resist it.