Though everyone suffers, not all suffering necessary. The suffering we self-generate when in a negative emotional state just adds to what we are already going through.
Some people become angry with God (or fate or the universe or life) when tragedy strikes. It can be hard to understand His will and timing. It can be hard to see any good in the middle of something bad, even in hindsight. But there's no such thing as gratuitous pain. It's all part of our experience.
Growth and pain are inextricably linked. One cannot exist without the other. This doesn't mean that all life is pain -- sometimes life can be pretty wonderful. It just means that pain is going to find us at some point. When it does, allow it to happen. Resistance just enhances its power. Joy can be found even in the midst of struggle, if we allow ourselves to feel it.
I live in an area of the world where it gets quite cold in winter. Just walking outside in below zero temperatures can be a grueling, pain-inducing experience. With each passing year I dread the winter a little more, but feeling anxious about the onset of the season only adds to my experience of suffering. If I really hate it so much, I should move. Since I'm not making plans to sell my house (yet), I might as well embrace the reality of winter.