“The moral degradation with time is easily visible to anyone with an eye on the past”
Depends on which morals. Granted regarding Arayos things are worse than in the past. However with other moral issues we are better. For example slavery, prisoners, enemies during war particularly civilians, women, minorities, including jews, mentally ill are all examples that I believe we’ve improved.
And even Arayos, it depends on how you define “past” clearly incest isn’t much of an issue, don’t forget chazal say in Noah’s time they were writing kesubos between men. It comes and goes with time it isn’t a steady downtrend