I have family members who struggle with addiction. As I read this chapter, I am impressed by the Lord's mercy and the fulfillment of his promise to Alma and his people. Alma and his people "did submit cheerfully and with patience to all the will of the Lord." And they "did pour out their hearts to him; and he did know the thoughts of their hearts." They had great burdens, but Jesus promised them "Lift up your heads and be of good comfort, for I know of the covenant which ye have made unto me; and I will covenant with my people and deliver them out of bondage."
15 And now it came to pass that the burdens which were laid upon Alma and his brethren were made light; yea, the Lord did strengthen them that they could bear up their burdens with ease
God doesn't always take our burden away. Our plea is often that he would remove some temptation or problem so that we just didn't have to deal with it any more. But often he simply increases our strength in the face of temptation so that we bear it with ease. Some things we are just powerless to overcome on our own. Alma and his people recognized this.
21 Yea, and in the valley of Alma they poured out their thanks to God because he had been merciful unto them, and eased their burdens, and had delivered them out of bondage; for they were in bondage, and none could deliver them except it were the Lord their God.