As far as I know, Romney's GOTV platform didn't scrape posts by people's Facebook friends without those friends' knowledge or consent in order to target their GOTV efforts, which is the part of Obama's 2012 campaign that is comparable to what Cambridge Analytica got in hot water for. Publications like the New York Times ran gushing articles about how brilliant Obama's team was for coming up with this and how marketers needed to learn from them.
I think you're probably reversing cause and effect. The distrust of large tech companies is the result of people being upset about Republicans being the ones who're using them to win elections now, not the cause. (Of course, the Cambridge Analytica data in question wasn't even used by Trump's campaign, whereas the Obama campaign did use questionably scraped Facebook data, but little details like that don't matter...)
I think you're probably reversing cause and effect. The distrust of large tech companies is the result of people being upset about Republicans being the ones who're using them to win elections now, not the cause. (Of course, the Cambridge Analytica data in question wasn't even used by Trump's campaign, whereas the Obama campaign did use questionably scraped Facebook data, but little details like that don't matter...)