When you live in a dictatorial regime, you do NOT make a noise about political decisions or situations. We had huge protests against Chavez in 2001 (300 murdered), in 2008 (500 murdered and many more incarcerated), in 2014 (mostly students: murdered, shot at, tortured or jailed) and in 2017 (same as 2014). Oscar Perez, an ex cop, began an insurgency against Maduro in 2016. In 2018, he, his wife and his buddies were attacked in their "hideout" by about 300 paramilitary thugs. They were all executed, at point blank range.
Russians are probably thinking "Jeez, if I open my mouth, I may fall out of a plane, get sprayed with neurotoxin, have my family murdered in front of my eyes, lose my job or end up in Siberia". So they don't say anything.