Just to clear some things up here.
Original Sin teaches that everyone spiritually died in Adam, and thus are born children of wrath by nature. This is a different doctrine than Original Guilt which teaches Adam's specific sin was attributes to each of his progeny. However, it does end up still that all people are born sinners. There is a preponderance of Biblical support that one man's sin brought condemnation to all.
Yes, one sin infinitely offends God, or an endless hell would not logically make sense. You would literally have to deny hell and become an annihilationist to reject that logic.
Sins were not "paid" for by animals, this is not what anyone teaches, it's a straw man misrepresentation. The animals symbolized the once-for-all payment to come in Christ, and God accepted that faith in Christ's vicarious sacrifice.
Of course God could have logically set up a different justice system or decided not to be holy, he has that power. There is nothing disputable in attributing to God the power to be whatever he wants, as he specifically claims he can.
Forgiveness from God must require Christ to suffer the penalty of sin. This is what separates Christianity out from Muslims and moralistic works-oriented deities who allow people to somehow work off their sin before a holy God.
Yes, Christ is the only one with the worth to redeem humanity. This should not even be in dispute. Yes, Christ become a human being to take our place for us—why else would he even do it? To put humanity on the pedestal and say how great we are?
Yes, Christ takes the penalty of sin. Else God is actually permissive towards evil, and we know that is not true. Else God violates his own Holy Law and we know that is not true. This is the source of our redemption—the suffering of Christ for our sins. We see the picture God chose to represent Christ on the Cross was actually a snake on a pole—please deeply pray and think about that.
Imprecise descriptions of condemnation are unhelpful, there is no literally separation of ontology. Nothing can literally be separated from God.
Please give this some original thought and prayer instead of watching another anti-PSA video, because this is an important truth.