IMO There are some people who are generally happy and some people who are miserable and the average ‘happiest’ age isn’t really that predictive. Positive and negative life events play a role, but time going by doesn’t just make you sadder or happier without something else going on.
Some people seem to think anything is fine if it’s for social media. An Apple genius was fired recently for making ‘I work at Apple ’ tech tip Tik Toks and she seemed totally baffled as to why that might be a problem.