Sorted:

Whatever befalls you was never going to miss you, and whatever you missed out on was never going to reach you

What has come concerning those who reject Qadr

Those who assume about Allah an assumption of evil nature, Upon them is a misfortune of evil nature

What has come concerning (لو) – (If/Would that)

Humans are Indeed Ungrateful – Beneficial Hadith

Who are the Jabariyyah?

Evil is not attributed to the actions of Allah, the Mighty and Majestic, but evil is attributed to the created

Past and Future sins being forgiven is specific to the Prophet ﷺ

Is abundance of illnesses from the signs of the last hour?

Verily a man could be deprived of provisions due to a sin he committed, and Duā and Qadr clash in the sky

Are Good & Evil in the Hands of Allah?