For those whom had not tried fasting during waking hours, it is not a simple ordeal.
Although one can gorge oneself before sunrise, there is only so much one can eat before strong or weak metabolism rate kicks in. Regardless if one works in an office staring at the computer screen or another who works under the sun doing heavy liftin work, it is an ordeal, more so if one abstains even from water for the next 12hrs, let alone achieve the OBJECTIVES of Ramadan fasting - self restrain, self control, empathy for others & spiritual discipline in direct relationship with ALLAH, thru Islam - a religion that was meant for Peace.
Not many would be able to go thru such ordeal, & some give up.
ALLAH - ever merciful & compassionate - does understand. We are not perfect but flawed. There is always another time, as time is eternal to ALLAH. who is known by many other names thru different cultures, time & space.
Those who failed, is comprehensible. WHO is another but mere mortal, to judge?
However, those who failed, & yet attempts to make up for such failure by being even MORE ULTRA religious thru outward forms, & worse - to hurt & harm others - will NOT be forgiven by ALLAH.