If it is the election results that are making me feel this way. I try to be optimistic even about that. I imagine what if the party I did not vote for, manages to do the good things they promised. In USA example would it not be awesome if Trump actually manages to end some wars (in at least somehow fair way)?

Lots of pessimism in USA right now, huh?

I think this is quite common for half of USA to feel this way when the other party wins the election. This is due to electoral system you have, which has very a side effect of very strong negative campaign. So if you believe one party whole wold will go to hell if the other party wins.

But the world will not go to hell. In my probably less affected opinion nothing this bad will happen:

1. Although Trump had some tendencies to overthrow the voting system, such tendencies are usually gone when people win the election.
2. No one will start concentration camps
3. Trump is very bad at keeping his promises (where it the famous wall?)
4. No one will prosecute others just for what they were voting. It is impossible to know who voted what. Also why would Trump want to start internal war? There is no support for such war. Etc. Etc. So no. The worst case scenario is not possible. Your system has way to many safety mechanism for whole country or world would go to hell. And a lot of people who voted for Trump are not that extreme. So there is no support for the most extreme policies.

About the work though. Under any government positive or negative changes are quite slow to implement. In many countries there is a housing crisis. And even if in my country government is bound to fix this issue it will take 10 or more years to fix it. So my generation will have to find a place to live somewhere in current market conditions.

So in any case it is very bad strategy to hope for the government to fix your personal issues like your housing, your salary, your job, your dating, your happiness. On those you have to work by yourself. And I can assure you the difference you can make on your life is enormous.

To fill you with some optimism you can try to write a list on what you life would look like if you really try to improve it. And yes of course live the politics out of it and focus only on your life and changes you can affect.

For my personal escape it made the most difference to become more optimistic:

1. By practicing gratitude
2. By always trying to look on the bright side of thing. I believe those things make the most difference. Because imo happiness comes from thinking you have awesome life.

Edit: Why the down votes?

A very good point! It gets to me the most when I really try to write a well structured argument. Like yours. And then someone comes and just dismisses whole point with some logical fallacy or something like that. It hurts the most since I spent a long time writing such post.