You are wrong on so many counts that I will only choose one to reply to. It's this one: "I mean, we all know that the universe can’t be eternal for several factors."

Oh yes, the universe can be eternal, because it is! The universe exists because a state of Absolute Nothing cannot exist. Consider that 2+2=4. This fact is by default. No one created 2+2=4. It just is. It was true even before the Big Bang.

It's the same with the universe; it exists by default because there's never been (and can never be) a state of nothingness.