Here are some other passages in the gospel that I believe will help you understand the rich man:
Matthew 7: 7-11
“Ask, and it will be given you; search, and you will find; knock, and the door will be opened for you. For everyone who asks receives, and everyone who searches finds, and for everyone who knocks, the door will be opened. Is there anyone among you who, if your child asks for bread, will give a stone? Or if the child asks for a fish, will give a snake? If you then, who are evil, know how to give good gifts to your children, how much more will your Father in heaven give good things to those who ask him!
Luke 6: 32-35:
“If you love those who love you, what credit is that to you? For even sinners love those who love them. If you do good to those who do good to you, what credit is that to you? For even sinners do the same. If you lend to those from whom you hope to receive, what credit is that to you? Even sinners lend to sinners, to receive as much again. But love your enemies, do good, and lend, expecting nothing in return. Your reward will be great, and you will be children of the Most High; for he is kind to the ungrateful and the wicked.
I believe there is a lesson to be learned here by the rich man’s reaction. Without spiritual maturity, we are vulnerable to think of the damned as being cartoon-like villains. People that snatch candy from children with their right hand while holding their left fist in the air and laughing. This is, perhaps, in order to help us feel better about ourselves, but it is not a tenable perception to hold. After all, why would a wicked person act like that anyway? It would only be harmful to themselves, because their reputation and their social life would be ruined, and they wouldn’t get far in life. The rich man seemed to have some kind of care - or appearance of care - for his descendents, but it was surely not agape love. Any animal knows how to care for their offspring. While it may be noble for a parent to care for their child, it is certainly the least noble of noble things, because it is a care that is largely forced upon them by power of instinct. Because God is a perfect Judge, we can be assured the rich man would not be in Hades had he not deserved it. He had violated the Greatest Commandment again and again by his lack of love, and he did not repent.
That being said, we might safely speculate that there are surely people worse off than him. Sin committed by malevolence/sadism is considered the gravest.
edit: And btw no: people that go to Hell or Heaven are in that state for eternity. The finality of their decision is revealed. A saved person will not fall and a fallen person will not rise.