I think there is going to be no ultimate justice in this world...

We are all going to die. That is written into the code of the universe. Absorb the deep meaning of this, and realize that worrying about what happens during what is - by definition - a temporary arrangement is meaningless. Justice? So what. You're dead one way or the other, and given that justice is usually incorrectly measured by life vs death, there can never be a world where everyone doesn't lose in the end. Measure it by suffering? Well, those you love are going to die too, often of some disease we cannot cure. You are going to suffer. There's no getting around it.

So what's the point? The point is not the result; it's the process. A good life is a life to which you contribute what you know to be your best. Where although at any instant you may die (which is always true), if you die you do so doing what is right in your heart. Don't worry about changing big L Life; rather live your life in a way which creates harmony and meaning. Death then ceases to be a loss and becomes just the next event to continue on with.

I don't hate the general idea of human society, I just hate the current incarnation of what society is.

I 100% agree. I've thought this to myself many times in the past couple of years. We are capable of much better. We have all experienced that there are moments when we can get it right. We know the feeling when it's on us. The current incarnation at a government/corporate level is evil, no doubt about it. But there are a lot of people resisting now, more every day. Again, live your best life; beyond that we are all in the stands watching to see what big L Life will do. Beyond living our best individual lives, the rest is out of our hands.