In most of the US there is “no-fault” divorce. Either party can petition for divorce without having to demonstrate to the court any reason to legitimize the petition. The divorce is usually granted even if the other party wants to remain married.
In England, you must prove to the judge that there is valid reason for the divorce, even if both parties want to separate. This is particularly problematic when only one party wants to separate but doesn’t have a valid reason for it. Then they must make the marriage sufficiently unpleasant for the spouse so that the spouse will a) want a divorce and b) have a verifiable good reason for it. For example:
One petition read: “The respondent insisted that his pet tarantula, Timmy, slept in a glass case next to the matrimonial bed,” even though his wife requested “that Timmy sleep elsewhere.”
The woman who sued for divorce because her husband insisted she dress in a Klingon costume and speak to him in Klingon. The man who declared that his wife had maliciously and repeatedly served him his least favorite dish, tuna casserole.
and most egregious of all
“The respondent husband repeatedly took charge of the remote television controller, endlessly flicking through channels and failing to stop at any channel requested by the petitioner,” one petition read.