There does not seem to be anything wrong with this phrase, and there is nothing to dictate that one should be strict about it or tell off anyone who says it. But saying “May the angels pray for forgiveness for you, and the like,” is more appropriate and is better.

Giving a name such as this to this type of food is like a metaphor, and there is no reason to think that it is sharing a name with Allah, may He be exalted.

There is nothing wrong with saying of a believer who has died that he is under the care of Allah, although this protection is not unique to the deceased, as we have noted from the hadith quoted above that the one who prays Fajr is under the care of Allah. For more details, please see the long answer.

It is proven that it is prohibited to inveigh against time, and the reason for this prohibition is that this inveighing includes one of two grave evils: by saying this, the one who is inveighing is either attributing the creation of events to time, in which case he is associating something else with Allah, may He be exalted, or he believes that these events, for which he is inveighing against time, are decreed by Allah, may He be exalted, in which case he is condemning Allah, may He be exalted – we ask Allah to protect us from that. The reason for the prohibition mentioned above is not applicable in the case of saying “Life is not good,” so there is nothing wrong with saying that or condemning this world, by way of highlighting how insignificant it is and how bad it is to be distracted by it from seeking the pleasure of Allah, may He be glorified and exalted, and by way of [??] feeling sad for what one misses out on of its glamour and gains.