Personally, I take it as literal, because I have no reason not to.......but if you do not wish to see it as literal, at least you can acknowledge the lesson. Jesus used it to illustrate what the situation would be like at the time of his return. (Matthew 24:37-39)
Because of demonic interference, the world of Noah's time suffered destruction because of its incorrigible wickedness.
No one listened when the warning was sounded because no one believed what Noah said. They carried on with their lives like it was no big deal. Jesus said that situation was to happen again. The world of today is also incorrigibly wicked and getting worse by the day. Demonic influences are responsible for the perverted sex and violence of today, just as it was back in Noah's time.
There is no justice in this world because of who is running the show. The Apostle John identified who that is.....
"We know that we originate with God, but the whole world is lying in the power of the wicked one." (1 John 5:19)
How did the devil get to become world ruler? He claimed he could do a better job at ruling mankind, so God let him prove how good his rulership really was.
"So he brought him up and showed him all the kingdoms of the inhabited earth in an instant of time. 6 Then the Devil said to him: “I will give you all this authority and their glory, because it has been handed over to me, and I give it to whomever I wish. 7 If you, therefore, do an act of worship before me, it will all be yours.” (Luke 4:5-7)
The devil could not offer what was not his to give. Jesus never disputed his claim, but showed that he would not be a part of it. This is why he told his disciples to be
"no part of this world". (John 15:18-21)
So it was always the devil's ambition to be mankind's god and ruler....and he could give rulership of any part of the world to whomever he wished. Do you see it? I believe it is quite obvious.
So don't expect to see justice prevail in this world....only in the one to come. (2 Peter 3:13)
There is....but he has just been horribly misrepresented by fake Christianity. Remember when Jesus warned about the "wheat and the weeds"? (Matthew 13:24-30; 36-43) That parable is telling us that the devil would set up a false kind of Christianity shortly after the first Christians were established. Christendom is a product of those "weeds". You will find no truth in that divided mess. The identifying mark of true Christianity is not division, but unity and love. (1 Corinthians 1:10; John 13:34-35)
Please allow me to recommend a simple book, called "What Does the Bible Really Teach?"
Here is a list of the Chapter titles.
Contents — Watchtower ONLINE LIBRARY
It's is a very easy to understand guide to what the Bible really teaches, as opposed to what it does not teach. You may be surprised at what you find. I will leave it with you to evaluate for yourself if you so wish....
There is even a play button if you would like to listen instead of read.