The problem with suffering is twofold.

1) Believing that suffering is bad, that life is going to be this way from here on out.

2) The worst is that nobody does anything to help you. It's plainly spelled out in Leviticus 19:9-18. No belief in God, Jesus or other deity is required. In fact, all of the religion in the world consider doing unto others as you would have them do unto you.