The Prophet Muhammad (peace be on him) described divorce as ‘the most hated of permissible acts' to Allah [Abu Dawood] It’s disliked, but it’s still permissible: if you hit a dead end, you have an exit, and this is out of Allah’s mercy. If two people came together with right intention, but then discover that they have personality clash, or cultural clash, or whatever it may be, talaq is the way to leave with ihsan. In Jahiliyya times, they used to divorce their wives and then take them back, and go through cycles over and over again. This just caused extra pain, so in Surat al-Baqarah Allah places a limit of three talaqs, and in this surah He explains the valid forms.