I think the problem is not islam or anti islam. Both seems to have axes to grind.
The problem is someone else wanting to regulate others’ private lives.
Besides they vast majority of people are using monogamous marriage as prescribed by government.
Government recipes are often far from normal.
If in Europe, the guy can not force the wife for sex (so sex is not part of the contract). Husband must keep paying girls already having an affair even though the girl already screw the other guy.