What/whose agenda are you talking about? I'm talking about metrics-based social science research and, like you, the doubts, questions,  and pain of many "nones" I know. 

Many--dare I say most--were part of families that practiced the faith "faithfully." They didn't
 lazily opt out because they had too much to do on Sunday. You insult their discernments, rigors, and pains by making them sound less than rigorous and vigorous in their decision making. At least half are products of formal Catholic education--from pre-Vatican II to post-Vatican II.

As for the #1 reason. If you take my sample base--wide but not research-tenet sufficient--it's not even close: the "demeaning and ignorance"  (their words) of women, gays, and human sexuality,  followed by, at #2,  my education.  You might disagree with that conclusion, but it can't be denied. 

I am not a "none." Not even close. Like you, I deal with "nones" quite a bit. A whole lot. So please don't presume I have or reflect some agenda.