Ellie, there is absolutely nothing wrong with making this type of post. This is exactly the type of thing the forum is here for; to share what we've learned from the Scriptures and to ask questions. Sometimes, though, these things don't generate a lot of discussion, either because no one has anything to add or because none of us has really studied it out, either.
I will say that I agree with you in that Eliphaz, Bildad, and Zophar made a lot of false assumptions in what they were saying. They assumed that God was punishing Job for some specific hidden sin in his life and that He had caused all this misfortune to befall Job rather than simply allowing it to happen. It seems to me that they also falsely assumed that God does not do anything without justification, not realising that God does not need a reason or justification for ANYTHING He does.
Exodus 33:19 And he said, I will make all my goodness pass before thee, and I will proclaim the name of the Lord before thee; and will be gracious to whom I will be gracious, and will shew mercy on whom I will shew mercy.
Romans 9:14 What shall we say then? Is there unrighteousness with God? God forbid. 15 For he saith to Moses, I will have mercy on whom I will have mercy, and I will have compassion on whom I will have compassion. 16 So then it is not of him that willeth, nor of him that runneth, but of God that sheweth mercy. 17 For the scripture saith unto Pharaoh, Even for this same purpose have I raised thee up, that I might shew my power in thee, and that my name might be declared throughout all the earth. 18 Therefore hath he mercy on whom he will have mercy, and whom he will he hardeneth.
They didn't recognise the fact that neither they, nor Job, deserved anything good from God and that they all deserved the same punishment for wickedness. Job repented of his attitude after God spoke to him, but the other three did not, which is why God rebuked them at the end and told them to have Job pray for them. Notice He did not say anything to Elihu, though.
Thank you for posting this. You pointed out some things that I had never really thought about before. I've read through Job several times, but never taken the time to actually study it before.