There is no such thing as 'Penal Substitution Theory.' There is the Doctrine of Penal Substitution, and your understanding falls short of it. A 'doctrine,' by the way, means a teaching; it does not denote whether it is right or wrong. But to say, "
my view is a doctrine, and
your view is a mere theory, is just another example of tendentiousness.
Isaiah 53:6.
'And the LORD has laid on Him the iniquity of us all' That is a transfer of sins from us to Christ. Was our iniquity transferred to Christ legally or illegally? Christ is our 'surety' (Hebrews 7:22). This is a legal term, with legal sanctions (Proverbs 6:1-5 etc.). Christ willingly became legally responsible for our sins and paid for them in full.
The

emogee is getting overworked. Science has laws and theories; theology has doctrines. Doctrines may be true or false. If you are trying to prove part of the Doctrine of Penal Substitution to be false, you are making a wretched job of it. All you are doing is coming across as smug and condescending.