I'm not a religious person but I don't rule out the possibility of there being something after death, considering all this I don't think it's fair that the person who commits suicide is condemned to eternity in hell, some people live in hell on Earth and even after death they will be doomed to more suffering? I can't find any logic in it
TLDR: you don't have anything to worry about, because like you said there's no logic in it.
There's many different religious conceptions of the afterlife, but I think that eternal torment is not one to worry about too much. If God is morally neutral, then God probably doesn't care about the affairs of humans that much anyways. If God is perfectly loving, then it is extremely unexpected that eternal torment would even exist at all. An evil God cannot exist because being evil is ontologically inferior to its alternatives. If by chance the Christian God exists, I think it's safe to say that unbelievers will likely just cease to exist. Conditional immortality is the most supported view, because the concept eternal torment hardly shows up much in the Bible anyways. If hell is really eternal separation from God, as is commonly taught, then that means you must cease to exist since God is omnipresent (the only way to be separated from God is to not exist). And then there's universal reconciliation, where after a short period of punishment for some people (cleansing of sins) everyone eventually goes to heaven. Only an evil God would have something to gain from allowing people to be tormented eternally, and like I said an evil God probably does not exist.