So you're saying people without the opportunity to learn about Christ are rejecting Christ?
That's like one translation. Here's 5 other translations that don't stipulate that you go to hell for voluntarily rejecting Christ, but just not believing in him.
"And anyone who believes in God's Son has eternal life. Anyone who doesn't obey the Son will never experience eternal life but remains under God's angry judgment." - New Living Translation
"He that believeth on the Son hath everlasting life: and he that believeth not the Son shall not see life; but the wrath of God abideth on him." - King James Bible
"He that believes on the Son has life eternal, and he that is not subject to the Son shall not see life, but the wrath of God abides upon him." - Darby Bible Translation
"He who is believing in the Son, hath life age-during; and he who is not believing the Son, shall not see life, but the wrath of God doth remain upon him." - Young's Literal Translation
"He that believeth on the Son, hath everlasting life: and he that believeth not the Son, shall not see life; but the wrath of God abideth on him." - Webster's Bible Translation.
Ambiguous translations. Biblical inerrancy. Pick one again.
At the end of the day, we have a limited perspective. God is not human, we cannot claim to know why he does what he does. Here are some articles that look like they do a good job with the subject:
So God is omnipotent and good, but allows the world to suffer because "lol idk"?
I'm not gonna tell you what to believe, but how does this actually sate your own skepticism?