Luther and others came to the conclusion the Church had veered far from its origins. Reform was impossible. With all due respect, the results of doctrinal corruption was formalized at Trent, with it's focus on man's free will. Trent reacted to everything opposite the Reformation so there would never have been any reform inside the Church.
There is nothing I see in your post that contradicts anything that has been so far stated. I'm confident that your future posts will simply bear out the facts and I welcome another perspective.
Historical revisionism. Considering Luther's contradicting of himself, repeatedly, along with all of his other problems; drunkenness, schizophrenia, paranoia, inability to control his libido, et al, it's quite the stretch for you to definitively claim what conclusion(s) he came to. This is hardly the person you want to build a religious foundation upon.
"Most Holy Father, prostrate at the feet of your Holiness, I offer myself with all that I am and have . . . I will acknowledge thy voice as the voice of Christ."
Luther letter to Pope Leo X, May 30, 1518
"I never approved of a schism, nor will I approve of it for all eternity . . . That the Roman Church is more honored by God than all others is not to be doubted . . . It is not by separating from the Church that we can make her better."
Luther letter to Pope Leo X, January 6, 1519
The results of doctrinal corruption were formalized and institutionalized by Protestantism. Catholicism returned to the Thomistic and Augustinian theology that, along with the thoughts of the Greek Fathers, most closely expresses the orthodox Christian phronema.
Protestantism is permanently glued to the corrupt Ockhamist philosophical nominalism that polluted the mind of the young Luther.