Exactly right, our current society is almost exactly as it was in the days of Noah. The antediluvian world's people (except righteous Noah's family) had descended into gross homosexual depravity, and ours isn't too far from that same condition. God cleansed that depraved world's people with a universal flood, but He warns mankind that He will cleanse this current debauched world with fire.
I don't like to contemplate the severe judgment that God will impose on those societies, especially ours, that approve and practice homosexual depravity on a large scale, but they have been warned and have chosen to ignore the warning. Jesus Christ first came as a sacrificial lamb. But He will return to a future world cleansed of all sin and unrepentant sinners as the Lion of the tribe of Judah, and every human being will confess that He is Lord of Heaven and Earth.
I have never heard about the idea of homosexuality preceding the days of Noah so much as the Earth was filled with violence. If the fact that Lamech, a descendant of Cain maintained an oath of secrecy and murder, then the real, though not sole issue, preceding the days of Noah was people forming a bunch of Mafia organizations and murdering each other. This is further supported by God telling Noah after the flood that murderers should receive the death penalty.