The core issue was: Then the Lord saw that the wickedness of man was great on the
earth, and that every intent of the thoughts of his heart was only evil continually.
There are varying levels of wickedness (sin) on the earth since Adam all the way to today.
Some are, what we would call minor - let's say a poor person steal bread to survive - would you judge that level of sin (wickedness) as worthy of DEATH ? Of course you wouldn't and neither would i but MOST IMPORTANTLY neither does God in the Law.
God clearly stated the levels of sin described in His Law and, prior to the Law, we see them in His Judgements.
The Judgment of the World Wide FLOOD was REQUIRED and EXECUTED by the LORD - Why ???
Becuase people were only wicked? - No, but because of what TYPE of wickedness that was being conducted upon the earth, AND that it was SPREAD throughout where ONLY Noah and a total of 8 souls were saved.
The Falling Away/Antichrist/Beast/MARK are justs as 'in the Days of Noah.'
God is NOT the author of confusion - He makes known His Word to His Sheep who Hear His Voice - which you are a part of.
AMEN