The burning lake of fire is literal. I gave you a large list of Scriptures where JESUS describes (His words, not mine) what it will be like there: gnashing of teeth, torment, everlasting destruction. This teaching is persistent throughout the Bible. It's repeated too often to make the claim that it is simply an unconscious sleep.
Symbolic Scriptures don't have real people with real names like Abraham and Lazarus in Luke 16.
Jesus persistently taught that hell is a burning lake of fire. If hell is just annihalation as you claim, wouldn't that make Christ a liar (symbolic or not)? Exaggeration is a lie after all!
You say there is no literal burning hell. Ask yourself, before you deceive more people,
what if you are wrong?
If I am wrong, I can stand in front of God's judgment seat and tell God that I am teaching what Jesus Christ persistently taught.
However, if you are wrong, you will be deceiving people to believe that there are no consequences of sinning, falling right into Satan's trap.
The Holy Spirit uses the consciousness of our sin, the righteousness of Christ and the knowledge of judgment to convict people to believe in God (John 16:8-10). If you take away the judgment of hell, you are giving people a license to sin, and the consequence of that is obvious. And you will be responsible for deceiving others.