Origin of the verb ‘create’
‘Create’ does not come from Latin creatra; it comes from the past passive participle creātus, from the verb creāre ‘to create’. (Like all other verbs in -ate in English, which also come from a generalised participle of verbs that originally belonged in the first declension in -āre in Latin.)
This verb in itself is from a Proto-Indo-European root *ḱerh₂- whose original meaning seems to have been ‘grow’. Creāre is kind of a conflation of stem forms (full grade *ḱerh₂- > Lat. cer(i)-; zero grade ḱr̥h₂- > Lat. crā-; and vrddhi forms with ḱreh₂- > Lat. crē-), but it is in essence an old causative verb, as with nearly all verbs in the first declension in Latin: its original meaning was ‘to make [something] grow’.
Making something grow is only a small step away from creating it, and that’s the path the verb took within Latin. In Latin, thus, the sense of ‘grow’ was relegated to the original inchoative verb (‘to start growing’), crēscere, which is found in English loanwords such as ‘crescent’ (waxing or growing moon) and ‘crescendo’ (steadily growing volume/pace). In other languages, similar changes of course took place, but the root is the same as that found in Greek κόρος/κόρη kóros/kórē ‘boy/girl’ (the ones that are growing = kids) or in Icelandic hirsi ‘millet’ (‘the grower’ = a type of corn).
Meanings of the verb ‘create’
As we have already seen, the original meaning of the word has nothing to do with creation—that is an extended meaning that developed in Latin.
The specific meaning of ‘creating somethingness out of nothingness’ that you attribute to God alone is also not found in Latin—the Romans themselves used the verb for many things that they, not their gods, created.
Even if they hadn’t, it is important to note that the verb is Latin, i.e., it was used in the Roman world. The Romans did not have the same monotheistic view of the world that some people today have: creation from nothingness to somethingness was not considered a godly prerogative at all. Within Christianity, it is a commonly held belief, but this verb was used long before the Romans ever heard of Christianity. Whether one religion or the other is true, or whether one god or set of gods or the other really does exist, is quite irrelevant to this: the Romans—who used the word—were unaware of this Christianity-based restriction on the concept of creation, so naturally they did not apply it to their words.
In other words, the only shift in meaning that has occurred with the word is not one away from ‘divine-only prerogative creation’ to simply ‘making’, but rather the opposite: from any ol’ act of making, to the more limited creation that some hold only God is capable of.