Did God really knew everything?

(No hate) I always thought if God knew everything. If he did then he would know that Lucifer would rebel against him and doom humanity. Also if he knew everything, he would have prevent Adam and Eve from eating the forbidden fruit. If he let this all be done because he gave them free will then people can sin because it's their free will . It doesn't make sense for God to put sinners in hell because it(Satan) was his creation.