Complaining too much can’t make Jehovah happy (Nu 11:1; w01-E 6/15 17 ¶20)

That kind of behavior can make people ungrateful and selfish (Nu 11:​4-6; w06-E 7/15 15 ¶7)

Too much complaining can discourage other people (Nu 11:​10-15; it-2-E 719 ¶4)

Even though the Israelite them were catching hard time in the wilderness, they still had good reason to tell Jehovah thank you. When we think about all the good-good blessing them we getting, it will help us not to be complaining too much.