> I hope to see the termination of dictatorial countries in my lifetime but with extremism lovers in the most powerful one, I'm afraid to see the return of them...

There's always a risk, but if you want to be optimistic, keep in mind that never has humankind been so interconnected and aware of what's going on in the world, compared to any other point in history. People criticize the Internet and social networks, but the fact remains that, thanks to them, anyone in Canada, or the US, or France, or even Russia, can see the injustices happening in places like Iran; and although disinformation circulates more freely, the flipside of that is that knowledge(and truth) is also easier to research, share, and learn. We already saw these networks playing a huge role in the Arab Spring - and while that was only questionably "successful", ultimately the more we progress, and the more people are exposed to the outside world, and different cultures, the more things will improve.

This is the reason that things like gay rights, or religious freedom, have become more widely accepted worldwide; younger generations are exposed to these concepts, learn why they're valuable and what intellectual discussions they can have around them, including from their own geographical cultural perspectives compared to others, and it thus becomes easier to transmit to future generations those values and discussions.

And, on the other hand, while the reactionaries do still exist, and sometimes use increasingly violent means to conserve power (or regress society), they are increasingly viewed as an aberration, by an increasing number of people. It becomes a whole lot harde to take over, introduce fascism, and destroy people's rights, if your basic premise is: "these things that you newer generations have learned are essential freedoms, and great ways to increase your standard of living, well we're taking that away and going back to a state that you know is worse".

So yes, things are improving, very slowly, despite the two, four, or eight steps back that some would like to take (or are currently taking).