No, it's not hard to understand.
Amo 4:7 "I also withheld the rain from you when there were yet three months to the harvest; I would send rain on one city, and send no rain on another city; one field would have rain, and the field on which it did not rain would wither;
Amo 4:8 so two or three cities would wander to another city to drink water, and would not be satisfied; yet you did not return to me," declares the LORD.
Amo 4:9 "I struck you with blight and mildew; your many gardens and your vineyards, your fig trees and your olive trees the locust devoured; yet you did not return to me," declares the LORD.
Amo 4:10 "I sent among you a pestilence after the manner of Egypt; I killed your young men with the sword, and carried away your horses, and I made the stench of your camp go up into your nostrils; yet you did not return to me," declares the LORD.
Amo 4:11 "I overthrew some of you, as when God overthrew Sodom and Gomorrah, and you were as a brand plucked out of the burning; yet you did not return to me," declares the LORD.
Ezekiel 36 16-17a,18-28.