What is the ruling on someone who intended to fast a make-up fast but did not have suhoor and did not fast that day? And is the repeated failure to wake up for Witr prayer an indication of Allah's wrath?

If a Muslim intends to fast at night but does not wake up for Suhoor, his fast is valid, because Suhoor is a Sunnah and not a condition for the validity of the fast. Intention resides in the heart, and whoever thinks to himself that he will fast tomorrow has made an intention.

Fasting is achieved merely by refraining from things that break the fast with an intention, even if one does not partake in Suhoor.

If one intends to make up a mandatory fast, such as Ramadan, and then wakes up after Fajr, he must fast and is not permitted to break his fast, because he has entered into a mandatory fast.

However, if one makes fasting conditional upon Suhoor, and does not make a firm intention, then this wavering intention is not sufficient for a mandatory fast.

As for a supererogatory fast, it is not a condition for the intention to be made from the night before, and one who is fasting voluntarily may break his fast whenever he wishes.

There is no harm in not waking up for Witr, because it is a desirable Sunnah, not an obligation. And whoever fears that he will not wake up for Witr at the end of the night, let him pray Witr before sleeping.