'immensely frustrating as there also seems to be no consistency in pronunciation or relation to spelling and spoken'

...whereas English has no such problems :)

https://en.wikipedia.org/wiki/Ghoti

Hahaha!

'Prolly' is (probably) just my phonetic rendering of some dialect usage I heard once. Forget I ever used it.

Although, on second thought:

https://english.stackexchange.com/questions/28776/how-old-is-the-word-prolly

No, English is just a bad - well, what do you know is usually rendered as well wadjerno. Not to mention: a rough cough though from the bough through there I thought.