Unfortunately, they did complain.  First, they complained about having no water, a need which God met by bringing them to water that was poisonous which he had Moses miraculously purify.  Next, they complained about having no food which God answered by giving them quail and a special bread from heaven called manna.  However…

-The people wouldn’t eat the manna-

-The people ate too much manna-

-The people sinned, so God stopped sending manna-

-The manna only came for six days a week-