Death, what were things like before Joker came into the picture? How different can you say things were and if you could, would you change things from happening?
Times before Joker, let me think. I will admit, it was rougher. We traveled aimlessly through the void, looking for food always. We are so small, it is not easy to hunt. Usually we had to scavenge corpses and forage flora. It was always difficult to keep alive, as anything could kill us. We had our abilities for self defense but they could only do so much.
When we found the baby Joker, that changed. He provided us a proper goal than wandering. He hunted for us, he protected us, and in turn we tried to educate him and help raise him as best we could. I will not lie, those early days with Joker were... nice. Even when he found humanity and realized he could go into their heads for temporary homes for us, that was nice. He hadn't gotten greedy yet, we were still discovering things, looking forward to a better future where we could settle down and stop running for once.
Once he started to actually interact with the people we were becoming a parasite to in their dreams, it was over. Joker was heavily fascinated with them and started to prefer them over us. He did still provide and protect us, but it became more of an obligation chore than the social fulfillment and proper companionship he so desired.
If I could change things, I would honestly say I wish he would have never met the humans when he did. We could perhaps burrow into their psyche to feed off of them, but if we just had each other for that crucial turning point in him growing up... I feel as though he would have turned out different. If he was at his current age when he met them, perhaps he could have been more reasonable. But... we will never know.