No, the majority of humans are not going to hell.
The Western Journal recently ran an article on an exchange Elon Musk had on Twitter in May:
The Western Journal entitled the article, “Elon Musk Gives 100% Biblical Take on Hell After Making Chilling Announcement.” But is this take really 100% Biblical?
Revelation 7:9 says there will be an innumerable multitude worshipping Christ when He returns, so clearly a large number of people will be alive at the time. Also, Revelation tells us that people who died without receiving God's spirit will be resurrected in the future (Revelation 20:11-12). The books of the Bible will be opened to them, and they will have an opportunity for eternal life. Judgement does not happen at the time of our death, but rather upon resurrection (John 5:28-29).
The first epistle to Timothy 4:6 says God wants everyone to be saved and to come to the knowledge of the truth. 2 Peter 3:9 tells us that God is not willing that any should perish, but that all should come to repentance. Some people learn the truth in this life, and the rest will learn after they are resurrected. Very few will reject God and be destroyed in hellfire.
You might want to read or listen to our sermon “The Festivals Outline God’s Plan,” especially the section about the Last Great Day, for more information on this topic.