The existence of so many religions is not an argument against God's existence or an argument that truth about God is not clear. Rather, the existence of so many religions is demonstration of humanity's rejection of the one true God. Mankind has replaced Him with gods that are more to their liking. This is a dangerous enterprise. The desire to recreate God in our own image comes from the sin nature within us—a nature that will eventually “reap destruction”.
Many people do not want to believe in a God who demands righteousness and morality, so they invent a God who makes no such requirements. Many people do not want to believe in a God who declares it impossible for people to earn their own way to heaven. So they invent a God who accepts people into heaven if they have completed certain steps, followed certain rules, and/or obeyed certain laws, at least to the best of their ability. Many people do not want a relationship with a God who is sovereign and omnipotent. So they imagine God as being more of a mystical force than a personal and sovereign ruler.
Do all religions lead to God? Actually they do. All but one leads to His judgment. Only one—Christianity—leads to His forgiveness and eternal life. No matter what religion one embraces, everyone will meet God after death. All religions lead to God, but only one religion will result in God's acceptance, because only through His salvation through faith in Jesus Christ can anyone approach Him with confidence. The decision to embrace the truth about God is important for a simple reason: eternity is an awfully long time to be wrong.