Health…
Just a thought…
Being that it sounds like you are very aware of the mistakes you made in the past, I would guess that it is unlikely you would make THOSE mistakes again.
In the future, when considering someone new, be careful that as you are ruling out in the new person the traits that caused problems in the past, (in your joy at NOT finding them) don’t overlook possible different issues in the new person that did not exist in your first mate.
It would be my guess that it might be doing that, that causes the divorce-remarry-divorce-remarry scenario you described.