I think I represent the opinion of many millions of Christians as well as ex-Christians when I suggest that the problem is not sola scriptura or no sola scriptura.
The problem is that in either case we are those who can't force ourselves to believe what we in all good conscience simply cannot believe. Many of us who are educated in the scriptures as well as church teachings, both Catholic and Protestant, have reluctantly come to the conclusion that there is too much in traditional Catholicism as well as sola scriptural Protestantism that we cannot accept. Some observers would condemn us as a result, but would you want us to be hypocrites and assent to what we don't accept as 'gospel truth'?
Our problem with traditional Catholicism is that over the centuries it has added more and more doctrines and practices that strike us as not only unbelievable but actually pagan - borrowed from or influenced by the myths and miracles commonplace in the ancient world. These would include undue emphasis on Mariology, transubstantiation, various aspects of the saint phenomenon, and such practices as required priestly celibacy and the whole contemporary annulment process.
Our problem with sola scriptura (and this applies to traditional Catholicism, too) is that there are many fables, legends, myths and false history in the Bible (e. g., Adam and Eve, Noah and the Flood) and some concepts are simply anti-Christian (e. g., endorsement of slavery, 'suffer not a witch to live', and much more). Space doesn't permit me to start citing the scores of examples, but I did mention a few more specifics in an earlier posting.
While millions have fallen away from Christianity completely because of this, I love Christ and remain in the church and continue to be active in it. But - for exmaple - I simply refuse to say the Apostles Creed when that is recited. It was written for a different age ('sitteth on the right hand of God the Father'???), contains doctrines I question (virgin birth) and some that I don't accept (our physical resurrection).
We could go on, but I suspect that I've annoyed enough fine folks already. Isn't it shameful that religion is such a barrier among us when faith should serve as a bridge that draws people who profess God closer together? Those religions that emphasize that they alone follow the one true path are, in my view, inimical to the spirit of Christ and the cause of so much misunderstanding and prejudice in the world.
God bless Catholics, Protestants, Orthodox, Jews, Muslims, Buddhist, Hindus - abnd all God's children regardless of creed, color or country.