You do not seem to understand that there are various religions, each with their own belief structure, even atheists are not monolithic in their lack of belief in any religion, and what that entails.
I can not tell how deep your ignorance runs, so excuse me for stating what may be obvious to the informed, and new information to the ignorant.
The book of Solomon is Old Testament, so has special meaning for only Judeo-Christian religions, and particularly Judaism. Christians have adopted Old Testament teachings as background for their religion, but put very different meanings on the writings their Saviour studied while walking the earth.
Information is not the same to all observers.
Information entails subjective interpretation.
It is true that Jesus was a Jew, and it is true that many teachings of the various sects of Christianity seem to ignore this fact, still, it should go without saying that Christians do not view much of the Old Testament the same as Jews. - DUH!
If we want to discuss the teachings of Solomon, we would be ignorant to not do so in the light of Jewish beliefs and teachings.
On the point of heaven and hell, of the fruits of sin, Jews and Christians do not agree.
If you are Jewish, reading Solomon is fine, if you are Christian, you will do better with Paul. Just the way things are.
The teachings of Solomon are not inconsistent with Judaism.
Maybe this will help:
"We do believe in a type of Hell, but not the one found in cartoons and joke books. Hell is not a punishment in the conventional sense; it is, in fact, the expression of a great kindness.
The Jewish mystics described a spiritual place called “Gehinnom.” This is usually translated as “Hell,” but a better translation would be “the Supernal Washing Machine.” Because that’s exactly how it works. The way our soul is cleansed in Gehinnom is similar to the way our clothes are cleansed in a washing machine.
Put yourself in your socks’ shoes, so to speak. If you were to be thrown into boiling hot water and flung around for half an hour, you might start to feel that someone doesn’t like you. However, the fact is that it is only after going through a wash cycle that the socks can be worn again."
If you want to find fault with Christian teaching being inconsistent with Judaism - Hello! - Christians are waiting for the Second Coming of the savior, Jews are waiting for the First Coming, but I realize you probably did not know that.
Hope this helps.
And as a footnote, I do need to add that a Christian is offered eternal Bliss (hardly something to be dreaded), for simply asking for it.
A Christian is expected to be Sinful, but hell is not required, or expected, to be in their Eternal future.
Does sin deserve infinite Bliss? - that would have been a more relevant question to pose - if you understood the Christian perspective.
But then, you don't, you only think you do, and that is a definition of ignorance.