The Israelites express deep frustration and ingratitude regarding the heavenly food given to them, masking their true distress with physical complaints about dietary boredom. Vivid memories of the food they ate in Egypt cause them to forget the harsh reality of their slavery, leaving them with a lingering sense of emptiness in the present. They describe a feeling of intense internal dryness, which commentators understand on several levels. Physically, the primary approach among commentators is that the heavenly food lacked the natural moisture and variety found in vegetables and other earthly produce, leaving their bodies feeling unrefreshed [רמב״ן, הטור הארוך, ביאור יש״ר, רש״ר הירש]. Psychologically, the sheer intensity of their craving for other foods created an internal heat that dried out their nature [אונקלוס, רמב״ן], leaving the desiring part of the soul, which resides in the liver, feeling deprived [אבן עזרא]. On a spiritual level, this dryness reflects an absence of the refreshing moisture of Torah and commandments, which ultimately led to an ungrateful attitude toward God despite His constant kindness [שפתי כהן].
The people also complain that they have absolutely nothing else to eat, a frustration that some understand quite literally as a lack of any meal other than their daily portion [אבן עזרא, שטיינזלץ, אבי עזר]. However, many commentators offer a surprising alternative, suggesting that their panic stemmed from the way the food was digested. Because the heavenly bread was completely absorbed into their limbs and produced no bodily waste, the Israelites were terrified. They feared their stomachs would swell and they would eventually die, as it is unnatural for a person to eat without excreting [תורה תמימה, חזקוני, הכתב והקבלה]. In fact, it was only later, when they purchased regular food from passing desert merchants, that their bodies resumed producing waste [חזקוני, צאינה וראינה]. Beyond this physical anxiety, there was also a visual starvation. Even though the heavenly food could miraculously transform into any flavor they desired, its physical appearance never changed. Consequently, their imagination remained entirely unsatisfied, as they were constantly faced with the exact same visual experience [מלבי״ם].
This visual monotony led to a deep sense of boredom, as they were forced to look at the exact same food for both their morning and evening meals [רש״י, ברכת אשר, צאינה וראינה]. Yet, many commentators reveal a much deeper psychological struggle beneath this complaint. The true source of their frustration was not the type of food, but the unsettling reality of their total dependence on God. Unlike a normal person who enjoys the security of a stocked pantry, the Israelites had no ongoing food security. Every single day, they had to look up to the sky with a mixture of hope and anxiety, waiting for their sustenance to fall. Because they were ashamed to openly admit that they resented being completely dependent on their Father in Heaven, they sought out an excuse, projecting their deep-seated frustration onto a fabricated craving for meat [רמב״ן, העמק דבר, הטור הארוך, ביאור יש״ר].
The people went so far as to slander the heavenly food [תיבת גמא], claiming that it actively dried out their bodies and that its stark whiteness blinded their eyes. In direct contrast to these accusations, God's response immediately follows, testifying to the food's absolute perfection. It met every standard of an exceptional meal: it was highly nutritious and moisturized the body like a coriander seed. Rather than blinding them, its crystal-like appearance actually strengthened their eyesight, functioning similarly to the glass lenses that older people wear to see more clearly. Furthermore, its taste was rich and sweet like oil, and it was impeccably clean, falling from the sky securely wrapped and preserved between protective layers of dew [צרור המור, תולדות יצחק, צאינה וראינה].