From your numerology compatibility, a few points can be the likely problem.
1. Both you and your soon to be ex-husband share similar kind of characteristics.
Both of you are leadership material with a lot's of internal strenght.
There will be a constant power struggle in your relationship. You might have been very good friends when you were courting, sharing similar personal interest and ambitions. But as lovers, the flame then to fade away. In public, you will be often called the ideal couple.You understand each other very well, too well i would say. The subtle difference between both of you is that, you are a thinker and he is a dreamer of the first degree. To explain the failure in your relationship in a short sentence, there was no strong "Interdependability". Both of you shared almost the same strenghts and weakness. This formula is great for friendship and partnership but not as husband and wife. Either on of you should compromise and strain heavily to make the relationship work. That causes tension. I hope this explains the issue you were facing.
2. The GF and your H's compatibilty has stronger points. This is due to difference in their characteristics that will allow interdependability.