Calvin accused that he teaches Christ is only important and not doctrines and he denies that

“But we know that the Church is founded on the doctrine of the prophets and apostles, and that she ought to be united to Jesus Christ, her head, who is without variableness. So therefore it is but a bastard church where God's doctrine does not reign as the rule. Following that rule, we desire that God may be served according to his commandments, and we reject all new-fangled ways invented to suit the appetite of men; for it is not lawful for men to impose law or statute upon conscience, and God moreover has reserved to himself this privilege, to ordain for us whatsoever seems good unto himself.”

 Source: https://www.gutenberg.org/files/45463/45463-h/45463-h.htm

CCLVI.—To Monsieur de Saint Laurens From Geneva, ... [1549?]

 

Calvin blamed for making salvation cheap grace and good works of no importance and he denies that

“They take occasion on this account to accuse us of making no account of good works, whereby they do us wrong; for we are far more careful to recommend holy living, than are any of our adversaries. But in order that men may not deceive themselves by an overweening confidence, we teach that we are able to do nothing whatever in our own strength, unless God guides us by his Holy Spirit, and that even when we had done all, this would afford a far too feeble ground whereon to found our justification; that we must therefore have continual recourse to the mercy of God, and to the merit and passion of Jesus Christ; and that it is there that we must rest our hope, making no account of all the rest.”

Source: https://www.gutenberg.org/files/45463/45463-h/45463-h.htm

CCLVI.—To Monsieur de Saint Laurens From Geneva, ... [1549?]

Charles D'Espeville. Pseudonym for John Calvin