Good morning, cocoa and YeshuaFan;
Yes, there is theology that is clearly heretical. As far as Church having a "bit of bad theology," may I suggest putting it another way.
All Christian Churches, if we distinguish the desire to walk in obedience, our devotion to God's Word and applying it daily is sound theology.
Still, every single person is a sinner within the Christian Church. This doesn't equate to a bit of bad theology (study of God,) but living in disobedience.
The governance, autonomy or Church polity has never been perfect which is not bad theology. This is where God comes in to guide His Church because He is Perfect.
A bit or a substantial amount of bad theology begins with the Shepherd, or Church leadership who are leading the sheep - dishonesty, sin in secret, lust for members of the congregation, substance abuse in secret, etc...yet preaching and teaching the Word of God is hypocritical, thus bad theology.
YeshuaFan, many Churches have preference of translation, for example, the pew Bibles may be ESV, KJV, NIV, etc...But when a specific translation is being forced on the congregation could be your point though I have never experienced this with any Church, yet.
God bless you both.
Bob