If you are wanting to get divorced then the easier way of doing this is to avoid litigation and to ensure that you can complete a divorce agreement in Thailand with your Thai wife in Thailand.
There are a number of grounds for divorce in Thailand when getting divorced. These grounds for divorce are listed in Thai law however it leaves it open-ended as to accommodate different reasons for the divorce.
Divorce in Thailand used to be a social taboo not to be spoken about but this is starting to take the backseat as the society in Thailand changes.