To achieve such freedom it's necessary to know your legal stances and what are the grounds which are acceptable in the eyes of law.
Following are the judgements taken on mental cruelty ground to release the husbands permanently from the cruel wives.
Before going through the below links My special and most gracious Thanks to the website which is the original source of such links and judgements.
Thanks and Courtesy: http://advocateseema.in
100. Ramlali Vs Soneylal
case No. FA.NO. 104 of 1987
Madhya Pradesh Highcourt.