The issuing of suffering among humans and animals has always been the #1 issue to me. Some years ago, I was working in the door-to-door work alone and a nice, seemingly educated middle-aged man asked me about the suffering issue - how a loving god could allow suffering. I explained to him the textbook JW answer concerning the issue of universal sovereignty and how God has allowed suffering and is allowing it to prove a point. He completely understood the point I was making, but, he looked me in the eye and said "but, that is a hard perspective to keep."
His point was that what I said made sense, but when you see horrific suffering, it's hard to accept an answer like that. The suffering is not just, for example, a few headaches and some mild itching. It is often sheer unimaginable horror. There have been millions of years* of gruesome, horrible suffering. A few days ago, I downloaded as evidence of suffering a YouTube video of animals eating each other alive. I couldn't stand to watch it, but I did get a glimpse as I was downloading it. It showed a big herbivore lying on its side screaming in horror and terror as it was being eaten alive by predators. As one who is extremely concerned about animal welfare and who rescues animals, I have seen with my own eyes much horror. I have downloaded many videos and books and articles about it. Watch the YouTube video titled "Dominion"
https://www.youtube.com/watch?v=LQRAfJyEsko)
Read about some of the tortures humans have used on each other throughout history.
*Yeah, there is massive evidence that animals ate each other and suffered miserably for millions of years before any supposed rebellion in the supposed Garden of Eden. Completely blows a hole in the JW doctrine that suffering started after the rebellion.