This is just my opinion, but I would question the timeline. I think when you end up in this situation, it's natural to go back to the first time you had serious questions about the marriage, but it doesn't necessarily mean those questions have been ongoing or consistent.
For example, I remeber going through a bit of a rough time shortly after the birth of D6, where I was really hurt by some things that H said and they bothered me for months. Now 6 years later, if I was the one going through a MLC, I would probably say that the problems started 6 years ago - even though there have been many, many good times inbetween.
