The history of UI in Canada stretches back to the country’s early struggles in establishing a federally regulated unemployment program.
I am not sure if 'in' is the correct preposition here, although I prefer it. I googled "struggles in" and there is about half a million hits, "struggles at" returns only 700,000. I looked at The Guardian which does not have any entry with "struggles in establishing/forming/creating" or anything similar. Using at/over/of just is not clicking with me. I have looked at the other posts in this site but they are regarding the choice of preposition with the verb struggle. Can anyone enlighten me please?