It depends on how broad a view you want to take of culture. If you look at music, films, food and sport, I see no evidence that American people are enjoying US music, US films, US food and US sport any less than before, regardless of what's happening politically. However, if you include the economy as part of culture, then people certainly were disillusioned, and I don't blame them, kind of hard to enjoy life to the full if you're having to work multiple jobs just to have a decent quality of life.