There are plenty of reasons to be optimistic about the state of the world. As long as there are believers who remember Allah and care about the sunnah, then there is hope that things will improve.
One of the most important ways that everyday Muslims can contribute: have as many children as you can and raise them right, educate them right. If we all do this for as little as 2 or 3 generations, that will have an enormous societal impact bi idhnillah.
Ibrahim (as) had a plan that started with:
My Lord! Grant me (a child) from among the righteous.”[Quran 37:100]