Every organization on earth is going to have a human element that blemishes it. That's why the basic organization of the church is not on earth. Each believer can access Christ and be a priest.
The RCC had the Great Schism in the medieval period, and other groups split off. It had theocratic status through Constantine. It had reformers like Francis.
There is a sense in which the various post Reformation sects share something unwittingly with what the Reformation was protesting: that the grace of God in a person's life (transformation through steps, practices, sacraments) is identical enough to be managed by human institutions, and that it justifies. In one of the most backwardly expressed outcomes, we have almost all evangelicals referring to accepting Christ when the very issue that justification deals with is how God may accept us, if at all. Yes, when the sects name themselves after their 'steps' or 'practices' then it is pretty annoying. They often do so to put others down as incomplete or inferior. I don't see where the RCC is above that.
The observation that the Protestant sects actually re-cycle the RCC concept of grace is found in a church history essay called "Ecumenical Developments in the Christian Religion" and in another called "Protestant Revivalism, Pentecostalism and the Drift Back to Rome" both from a journal called PRESENT TRUTH in the 70s.
It has been shown that the Brethren movement in eschatology recycled Ribera's Judaistic eschatology so that the Pope would not be the target of Protestant criticism. The Brethren used it to resolve the ongoing friction in the UK, and that is how we got futurist Dispensational eschatology.