Divorce is a rough thing to go through.
Yes it is, reasons for he divorce vary though, from sexual incompatibility, or lack of independence. 
That's interesting that you say lack of independence.  Why?
One or both spouses could have personality clashes. one or the other might want to hang out with just their friends more than the other partner. 
I see.  I would say infidelity is a big problem as well.
I would think so as well. Most people want exclusivity and these expectations are not always met. 
I also think communication (or rather the lack of thereof) is also an issue leading to divorce.
Marital rape
Marital rape or spousal rape is the act of sexual intercourse with one's spouse without the spouse's consent. The lack of consent is the essential element and need not involve physical violence. Marital rape is considered a form of domestic violence and sexual abuse. Although, historically, sexual intercourse within marriage was regarded as a right of spouses, engaging in the act without the spouse's consent is now widely recognized by law and society as a wrong and as a crime. It is recognized as rape by many
spouses informally stop cohabiting). Reasons for divorce vary, from sexual incompatibility or lack of independence for one or both spouses to a personality clash.
The only countries that do not allow divorce are the Philippines, the Vatican City and the British Crown Dependency of Sark. In the Philippines, divorce for non-Muslim Filipinos is not legal unless the husband or wife is an alien and satisfies certain conditions. The Vatican City is an ecclesiastical state, which has no procedure for divorce. Countries that have relatively recently legalized divorce