He suffered, not more than He had to, but precisely as much as He had to. "Consumatum est’ - It is consumated/finished indicates that His mission was accomplished in full. We cannot separate any part of the passion out, as it is a singular event - a seamless garment of salvation, as was His cloak, and as is scripture. It had to result in death as atonement for our sins - for every sin ever committed or that would ever be committed.
God is an enigma, a mystery, - being ineffable, immutable and infinite in His mercy and love.
Yet, we are parts of Christ’s mystical Body on earth. Actual, living, breathing parts. We all suffer and for this reason, we are able to add to the sufferings of Christ for the sake of His Body, the Church. (Colossians 1:24)
Ever hear “Officer it up”? We have the possibility, even the requirement to offer our suffering for the sake of others. We are then most Christ-like and participate in His saving and redemptive mission.
Archbishop Fulton Sheen often lamented “wasted suffering” - that which was simply absorbed or tolerated and which was not offered to God for the sake of others.