Isn't Bernie Sanders a democratic socialist though? And also what governments and countries are you referring to?
I'm not very familiar with history but I think the only democratic socialist countries in a strict sense are the Eastern European countries (ie Denmark). Also, I think you're confounding quite a bit different political systems/styles of governance/schools of thought (democratic socialism with communism/socialism ).
Again, just like some view Trump as a symptoms to issues among rural communities, I think Bernie Sanders' positions and sharp popularity among certain demographics should be an indicator that something is going on among these groups that's resulting in staunch support of a candidate with highly polarized/radical views from our current norms.
The moniker democratic in democratic socialism is a worthless addition. It is putting lipstick on a pig. Whether democratic or not the end result is the same- loss of autonomy and liberty in the form of governmental or collectivist control. This is similar to how democratic the Democratic People's Republic of Korea (North Korea) is. Most people assume when you add the term democratic to something equates it to a just system. This is wrong. When 4 people are in a room and 3 of them decide to murder the 4th, that is democratic, but not just...
Next, Denmark is not in Eastern Europe...
Denmark is also not a socialist nation. Despite what Bernie would say, Denmark and the Nordic countries in general are based upon market economies. Some of them even have higher indices of economic freedom than the United States. They do have a large burden of social programs but these are only possible by a capitalistic economy with very high tax rates which includes a high income tax and often value added tax.
I agree that's something is going on with millennials. Some of it is indoctrination, some is naivete, some is pure ignorance, and some is normal young adult angst with the current system.
In most of the things that millennials are angry about (and now wsnt government to take over) ironically you can point to governmental intervention as the root cause. Take high student debt burdens for instance: once the government got into the business of money lending, schools had no incentive to keep cost of tuition low. Tuition costs spiral out of control and now we have a debt crisis.
When's the government got involved in regulation of medical care, we now have an increase in administrators of 3,000%, which is where most of the cost in medicine has gone. So when government has caused medical costs to spiral out of control obviously the fix would be to have government completely take over medicine.