Because if you spend enough time on the internet, especially the Western side, you start to hear voices of people who oppose their governments and not enough from those who support it.
Even many who are supportive tend to say that their government is authoritarian.
Despite being a Vietnamese living in Vietnam, I've never met anyone that consider themself a communist IRL. People my age think money is everything. No one's even bothered to educate themself ideologically. Older people are always skeptical of the government after being traumatized by poverty and war, combined with western propaganda.
The game shows are dumb, all of them.
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Nationalism does contribute to the support to the government. But The big factor for trust in any government is just material conditions that lead people to have hope that things will get better and don't have to live in constant fear. One thing I have learned from living in the West is nothing make you trust your own government more than having to live in a malicious and dysfunctional one. That's why I support the current government of Vietnam.
Damn. Where are you living currently? How is it going over there?