I think, by recognizing that it’s inevitable. The trade-off to having progressed is recognition of the ways in which others have not. Either you’re behind the curve, or you’re frustrated at those who are. The only world in which there are no crazy alt-right conservatives is the one in which you’re the craziest alt-right conservative, in which case you’re wasting your life getting upset about fluoride and the gay agenda. Sad!
The problem with the 'net is that it’s constantly calling attention to the dumbest stuff that the dumbest people are up to, at which point we dissect the ways in which said behavior is dumb, analyse its causes, and propose solutions which we lack the influence to actually advance. For the most part, there’s not a lot of catharsis in that, so it leaves you feeling jaded and angry.
The catharsis, I find, consists in the awareness of how you’re already making that which you value accessible to those who are mature enough to receive it. If you’re a woman in a profession, for instance, then each day of your life you are gradually teaching those around you not to think or behave like this Google guy (think Peggy on Mad Men)—it’s just not obvious because nobody is having a conversion experience right there in front of you. But, those daily interactions do add up, and they do make a huge difference.