Certainly something significant happened in the Garden. Luke tells us that Jesus was “in agony,” and that “his sweat was as it were great drops of blood falling down to the ground.” (Luke 22:44). That sounds as if Jesus was laboring under an enormous load.
That load, I believe, was the burden of the sins of mankind
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Of course He was under a burden, that is why there were angels. But the burden was the expectation of what was to come, not the sins of man.
As Godzilla pointed out, everything points to the Cross, and atonement references sacrifice, the shedding of blood and death of the sacrifice.
And I understand how the LDS view this, I did too. When I was LDS I downplayed the Cross, which I now see as because accepting that it was Christ’s ritual sacrifice as the perfect lamb (remember the OT system of Sacrifice is a type of Christ’s sacrifice) on the Cross showed that He took the FULL burden of my sins, not just what I couldn’t do. He did it ALL.
That is humbling and until I realized that my good works were unacceptable to God and that I was NOT one of His Children by birth, that my rightful place was separated from God and only through the Cross am I justified, only then could I see how important the Cross was and how insulting the LDS view of the Garden is to Christ’s perfect sacrifice.
Amen...and it's not just LDS that have "made the cross of Christ of none effect." Any religion that teaches humans can merit or earn eternal life by their deeds is preaching an accursed gospel and spitting in the face of the Lord who bought us by his own blood.