I agree. The biblical doctrine of Penal Substitution - that Jesus bore our sin, became a curse for us, died that we might in Him live - is in the Bible and throughout history.The Doctrine of Penal Substitution is found in the Bible and in the ECFs. There were no 500 page University theses on P.S. back then because it was generally accepted. It was entirely possible to hold Satisfaction and Christus Victor theories at the same time since they were not mutually exclusive back then.
But the Scripture tells us that the cross is a stumbling-block to the Jews, and so it was for Trypho. He wrote, 'But whether Chrsit should be so shamefully crucified, this we are in doubt about. For whosoever is crucified is said in the law to be accursed, so that I am exceedingly incredulous on this point. It is quite clear, indeed, in the Scriptures that Christ had to suffer; but we wish to learn if you can prove it to us whether it was by suffering cursed by God.'
Justin Martyr replies, after answering Trypho's concern, the Christ was not cursed for His own sins, 'For the whole human race will be found to be under a curse.....If those who are under this [Mosaic] law appear to be under a curse for not having observed all the requirements, how much more shall the nations appear to be under a curse who practise idolatry, who seduce youths...etc.'
He continues, 'If then, the Father of all wished His Christ for the whole human family to take upon Him the curses of all, knowing that after He had been crucified and dead, He would raise Him up, why do you argue about Him who submitted to suffer these things according to the Father's will.......'
Justin Martyr, Dialogue with Trypho, a Jew.
It's quite brief, but the Lord Jesus took upon Himself the curse of God that had rested on 'the whole human family.' That is why He was crucified although He had committed no sin. It is a clear statement of Penal Substitution. Christ endured the punishment due to us and took the curse upon Mankind to fall upon Himself.
The Theory of Penal Substitution- that God poured His wrath upon Christ in our stead - is not.