Did the invention of Protestantism 'fix up' what needed fixing in Christianity or?

is it still in need of extensive repairs. If you think it still needs 'fixing up' what specifically needs attention? ^..^

That's a very tough question. There's no doubt the church at that time needed fixing, but some could argue that the reformation went too far in the wrong direction. Yes, authority can become corrupt,but the solution then is to not abolish authority, but to reform it. Unfortunately protestantism wound up abolishing it, and spilled out to influence and maybe even create modern skepticism and agnosticism. The problem with the Bible being the sole authority is that each person who looks at it does so many times without the context of history, and it can create chaos.

Fixing it? I don't think its so grand. People just need to follow it and its teachings. Chesterton said Christianity never was tried and found wanting, it just was never tried.

Jesus said,

And I will ask the Father, and he will give you another Helper, to be with you forever, even the Spirit of truth, whom the world cannot receive, because it neither sees him nor knows him. You know him, for he dwells with you and will be in you.
(John 14:16-17 ESV)

Jesus says that He will send the Spirit to us to be with us forever.

A little later He said,
When the Spirit of truth comes, he will guide you into all the truth, for he will not speak on his own authority, but whatever he hears he will speak, and he will declare to you the things that are to come.
(John 16:13 ESV)

Since part of His role is to guide us, I take that to mean that we always need guidance. That means that we always have more to learn. So we haven't finished fixing Christianity. Or I should say that God isn't done fixing Christianity.

I tend to think of reformations, not just one protestant reformation.

Holy Spirit in the 19Th and 20Th centuries taught us a lot more about His own, that is the Holy Spirit's, work in the world and in the believer. I don't know why Holy Spirit decided to wait until then to expound those Bible texts to God's church but He did. I'm grateful for it.

It's still in need of major repairs. It's got too much bigotry, anti-intellectualism, and hypocrisy. And the food sucks.