Am I on the right track?

[MrBond]

Still avoiding the issue. There must have been some other issues. List them here. Go back to complaints your W had and stop pointing the finger back at her with the "well she did it too" type comments.

One of the fundamental rules of DB is to find out what behaviors were negative to your spouse and how you can change them.

And actually, comments like - "I was not as supportive as I should have been during that time. Again, however, that was 13 years ago,"
don't help.

The past has a way of coming back out to the present if they weren't dealt with in a healthy way before. Rug sweeping problems don't make them go away. Plus just because YOU don't have an issue with it any more doesn't mean that your W doesn't.